JP2011501049A - Seismic isolation device for structure, construction method of the device, and seismic isolation member - Google Patents

Abstract

The seismic isolation device 1 is a device that attenuates the vibration of the upper structure A of the structure relative to the lower structure B of the structure, and includes a plurality of seismic isolation members 10 having a U shape, The first connecting plate 20 to which one end of the seismic isolation member 10 is fixed, and the second connecting plate 30 to which the other end of the seismic isolation member 10 is fixed. The seismic isolation member 10 </ b> A is disposed between the first connecting plate 20 and the second connecting plate 30 in a certain direction. The seismic isolation member 10B is arranged between the first connecting plate 20 and the second connecting plate 30 in a direction opposite to the direction of the seismic isolation member 10A.

Description

The present invention relates to a seismic isolation device for a structure, a construction method for the device, and a seismic isolation member.
This application claims priority about Japanese Patent Application No. 2007-279148 for which it applied on October 26, 2007, and uses the content here.

  Conventionally, in structures such as buildings, bridges, elevated roads, and elevated railways, they are placed between the upper structure such as the frame and the lower structure such as the foundation. Seismic isolation devices have been proposed to damp structural vibrations. For example, Patent Documents 1 to 3 below disclose seismic isolation devices that combine an isolator and a damping mechanism between an upper structure and a lower structure.

  In the above seismic isolation device, the isolator is formed by alternately laminating metal plates and plate-like elastic bodies, interposed between the upper structure and the lower structure, and fixed to both. The upper structure is supported by the lower structure via an isolator. The damping mechanism is constituted by a plurality of seismic isolation members (curved members) made of an elastic-plastic material. The plurality of seismic isolation members are regularly arranged around the isolator (for example, radially). Each seismic isolation member has one end as an upper structure and the other end as a lower structure. Each is fixed. In the damping mechanism, for example, when an earthquake occurs, if a large energy acts on the structure and the upper structure vibrates in a horizontal direction with respect to the lower structure, the seismic isolation member is plastically deformed and absorbs the energy of the earthquake. That is, energy input to the superstructure is consumed to plastically deform the seismic isolation member.

Japanese Patent No. 3533110 Japanese Patent No. 3543004 JP 2004-340301 A

By the way, in the conventional seismic isolation device as described above, when the curved member as the seismic isolation member is arranged in parallel to the vibration direction, the energy absorption efficiency becomes the highest. Assuming that energy is input from any direction, it is always intended to exhibit equivalent seismic isolation performance. Therefore, when designing a seismic isolation member, it is necessary to conduct a very detailed study. In addition, as a result of such examination, detailed restrictions are imposed on the shape of the seismic isolation member, and based on such restrictions, the seismic isolation member is accurately manufactured so as to have a predetermined shape. There is a need.
Therefore, in the conventional seismic isolation device, human labor is excessively spent both in the design stage and in the manufacturing stage, and the manufacturing cost increases.

  The present invention has been made in view of the above circumstances, and has a seismic isolation device for a structure that can be manufactured at a low cost and has high production efficiency both in the design stage and the manufacturing stage. The purpose is to provide seismic components.

  In order to solve the above-described problems, the seismic isolation device of the present invention is a seismic isolation device that attenuates the vibration of the upper structure of the structure relative to the lower structure of the structure. A seismic isolation member; a first connection plate to which one end of the seismic isolation member is fixed; and a second connection plate to which the other end of the seismic isolation member is fixed. Among the plurality of seismic isolation members, some seismic isolation members are arranged in a predetermined direction between the first coupling plate and the second coupling plate, and the remaining seismic isolation members are Between the 1st connection plate and the said 2nd connection plate, it arrange | positions toward the direction contrary to the said predetermined direction.

  In the seismic isolation device of the present invention, both ends of the seismic isolation member may be fixed to the first and second connecting plates with bolts, respectively. The bolts are respectively provided on one end of the seismic isolation member and the first connecting plate, and on the other end of the seismic isolation member and the second connecting plate. Each may be provided, or a plurality of them may be provided. For example, in the case of fixing with three bolts, each bolt is preferably arranged so as to be positioned at the apex of a triangle. Further, both end portions of the seismic isolation member may be welded to the first and second connecting plates, respectively.

  In the seismic isolation device of the present invention, each of the first and second connecting plates is formed with a recess into which one or the other end of the seismic isolation member is fitted, and both ends of the seismic isolation member May be respectively fixed to the first and second connecting plates after being fitted into the recesses.

  The seismic isolation device of the present invention may include an isolator in which metal plates and plate-like elastic bodies are alternately stacked. The isolator is preferably disposed between the upper structure and the lower structure.

  The construction method of the seismic isolation device of the present invention includes a first connection plate fixed to a lower structure of a structure, a second connection plate fixed to an upper structure of the structure opposite to the lower structure, The first connection plate and the second connection plate are fixed to the first connection plate and the second connection plate so as to be disposed in a predetermined direction and in a direction opposite to the predetermined direction, respectively, between the one connection plate and the second connection plate. A construction method for disposing a base isolation device including a plurality of base isolation members on the lower structure and the upper structure. The construction method includes the step of disposing the seismic isolation device on the lower structure so that the seismic isolation member is along a direction of vibration assumed in advance of the upper structure with respect to the lower structure; A step of fixing a seismic device to the lower structure; a step of arranging the upper structure on the seismic isolation device; and a step of fixing the seismic isolation device to the upper structure.

  The seismic isolation member according to the present invention is disposed between the upper structure and the lower structure, and attenuates the vibration of the upper structure with respect to the lower structure that occurs in a previously assumed direction by plastic deformation of itself. And having a U-shape, arranged between the upper structure and the lower structure along the assumed direction of vibration, and having one end on the lower structure and the other end Each part is fixed to the superstructure.

  In the present invention, when a large energy such as an earthquake acts on a structure including the upper structure and the lower structure, and the upper structure vibrates in the direction in which the seismic isolation member is disposed with respect to the lower structure, One end portion and the other end portion are plastically deformed so as to be displaced away from each other, and energy input to the superstructure is consumed. Thereby, the vibration of the superstructure is attenuated.

  According to the present invention, assuming the direction of vibration to be input in advance and arranging the seismic isolation member along the assumed direction, the vibration of the superstructure generated in the assumed direction can be reduced. It can attenuate effectively. That is, in the present invention, energy input from all directions is not assumed, but only energy input from a specific direction is assumed. Unlike the conventional case, the seismic isolation member is designed. There is no need for detailed examination. Moreover, since detailed restrictions are not imposed on the shape of the seismic isolation member, it is not necessary to increase the processing accuracy of the seismic isolation member as much as conventional.

  The seismic isolation device of the present invention has high production efficiency both at the design stage and at the manufacturing stage, and can be manufactured at low cost.

FIG. 1 is a perspective view showing the seismic isolation device of the present invention. FIG. 2 is a side view showing the seismic isolation device of the present invention. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2 of the seismic isolation device of the present invention. FIG. 4 is a perspective view showing a first modification of the seismic isolation member provided in the seismic isolation device of the present invention. FIG. 5 is a perspective view showing a second modification of the seismic isolation member provided in the seismic isolation device of the present invention. FIG. 6 is a perspective view showing a third modification of the seismic isolation member provided in the seismic isolation device of the present invention. FIG. 7 is a perspective view showing a first modified example of how the seismic isolation member provided in the seismic isolation device of the present invention is fixed to the connecting plate. FIG. 8 is a perspective view showing a second modified example of how the seismic isolation member provided in the seismic isolation device of the present invention is fixed to the connecting plate. It is a perspective view which shows the modification of the seismic isolation apparatus of this invention. It is a top view which shows the modification of the seismic isolation apparatus of this invention.

An embodiment of the seismic isolation device of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 to 3, the seismic isolation device 1 of the present embodiment includes eight seismic isolation members 10, and a first connecting plate 20 to which one end 11 of each seismic isolation member 10 is fixed. And the second connecting plate 30 to which the other end 12 of each seismic isolation member 10 is fixed.

  The seismic isolation member 10 is a narrow rod-shaped steel material, and its middle portion is bent so as to form a U shape when viewed from the side. Two end portions 11 and 12 forming a pair of seismic isolation members 10 are respectively provided with bracket portions 13 and 14 that are wider than the other portions. The seismic isolation member 10 excluding the bracket portions 13 and 14 has substantially the same thickness in any part. The bracket parts 13 and 14 are provided so as to be parallel to each other. Two through holes (not shown) are formed in each of the bracket portions 13 and 14.

  The first connecting plate 20 is a rectangular steel plate having a uniform thickness, and one end portion 11 of each seismic isolation member 10 is fixed to the upper surface of the first connecting plate 20 via a bolt 40. A bolt hole (not shown) for screwing the bolt 40 is formed on the upper surface of the first connecting plate 20. A plurality of stud bolts 21 embedded in the lower structure when the seismic isolation device 1 of the present embodiment is fixed to the lower structure of the structure are erected on the lower surface of the first connecting plate 20.

  The second connecting plate 30 is also a rectangular steel plate having a uniform thickness, and the other end 12 of each seismic isolation member 10 is fixed to the lower surface of the second connecting plate 30 via bolts 40. A bolt hole (not shown) for screwing the bolt 40 is formed on the lower surface of the second connecting plate 30. A plurality of stud bolts 31 that are embedded in the upper structure when the seismic isolation device 1 of the present embodiment is fixed to the upper structure of the structure are erected on the upper surface of the second connecting plate 30.

  Of the eight seismic isolation members 10, four seismic isolation members 10 </ b> A are arranged at equal intervals along one side 20 a of the first connecting plate 20 and directed in a direction orthogonal to the one side 20 a. In addition, one end 11 is fixed to the upper surface of the first connecting plate 20 via a bolt 40. Furthermore, these four seismic isolation members 10A are arranged at equal intervals along one side 30a of the second connecting plate 30 and oriented in a direction orthogonal to the one side 30a, and then the other end portion. 12 is fixed to the lower surface of the second connecting plate 30 via bolts 40.

  Among the eight seismic isolation members 10, the other four seismic isolation members 10B are parallel to the other side 20b of the first connecting plate 20, that is, one side 20a to which the previous four seismic isolation members 10A are fixed. Arranged at equal intervals along the other side 20b and oriented in a direction orthogonal to the other side 20b, one end 11 is fixed to the upper surface of the first connecting plate 20 via a bolt 40. ing. Furthermore, these four seismic isolation members 10B are equally spaced along the other side 30b of the second connecting plate 30, that is, the other side 30b parallel to the one side 30a to which the previous four seismic isolation members 10A are fixed. The other end portion 12 is fixed to the lower surface of the second connecting plate 30 via a bolt 40 after being disposed and oriented in a direction orthogonal to the other side 30b.

  The four seismic isolation members 10 </ b> A and the other four seismic isolation members 10 </ b> B are fixed to the first connecting plate 20 and the second connecting plate 30. 10 A of seismic isolation members are arrange | positioned so that those curved parts may protrude in a predetermined direction from between the 1st connection board 20 and the 2nd connection board 30, and the base isolation member 10B has those curved parts. It arrange | positions so that it may protrude in the direction opposite to the said predetermined direction from between the 1st connection plate 20 and the 2nd connection plate 30. FIG. That is, the seismic isolation member 10A is arranged in the positive direction of the double arrow X in FIG. 2, and the seismic isolation member 10B is arranged in the negative direction of the double arrow X. The first connecting plate 20 and the second connecting plate 30 are arranged so that all four sides coincide when viewed from above.

The seismic isolation device 1 configured as described above is disposed between an upper structure A such as a casing in a structure and a lower structure B such as a foundation according to the following steps.
In the above structure, for example, the vibration direction of the upper structure A with respect to the lower structure B is assumed in advance, such as a bridge girder with respect to a bridge pier. Under such assumption, first, the seismic isolation device 1 places the seismic isolation members 10A and 10B on the lower structure B in the direction of vibration of the assumed upper structure A (indicated by the double arrow X in FIG. 2). (Both positive and negative directions). As described above, the first connecting plate 20 of the seismic isolation device 1 has the stud bolt 21 standing on its lower surface, and the seismic isolation device 1 embeds the stud bolt 21 in the lower structure B. And fixed to the lower structure B. Although not shown, when the stud bolt 21 is connected to a reinforcing bar disposed inside the lower structure B, the connection strength between the seismic isolation device 1 and the lower structure B is increased.

  Subsequently, the upper structure A is arranged on the seismic isolation device 1. As described above, the stud bolt 31 is erected on the upper surface of the second connecting plate 30 of the seismic isolation device 1, and the seismic isolation device 1 embeds the stud bolt 31 in the upper structure A. And fixed to the upper structure A. In addition, although not shown in figure, the connection strength of the seismic isolation apparatus 1 and the upper structure A is raised by connecting the stud bolt 31 to the reinforcing bar arranged inside the upper structure A.

  As described above, when the seismic isolation device 1 is disposed between the upper structure A and the lower structure B, a large energy such as an earthquake acts on the structure including the upper structure A and the lower structure B. When the base isolation member 10 vibrates in the direction in which the base isolation member 10 is arranged (both positive and negative directions of the double-headed arrow X in FIG. 2), the base isolation member 10 has one end 11 and the other end 12. Are plastically deformed so as to be displaced in directions away from each other, and energy input to the superstructure A is consumed. Thereby, the vibration of the upper structure A is attenuated.

According to the seismic isolation device 1, the direction of the input vibration is assumed in advance, and the seismic isolation member 10 is arranged so as to be along the assumed direction (both positive and negative directions of the double arrow X in FIG. 2). Thus, the vibration of the superstructure A generated in the assumed direction can be effectively damped. In other words, it is not assumed that energy is input from all directions with respect to the superstructure A, but it is assumed that energy is input only from a specific direction. When the member 10 is designed, detailed examination is not necessary. Moreover, since detailed restrictions are not imposed on the shape of the seismic isolation member 10, it is not necessary to increase the processing accuracy of the seismic isolation member 10 as much as in the past.
Therefore, the production efficiency of the seismic isolation device 1 can be increased both in the design stage and in the manufacturing stage, and as a result, the seismic isolation device 1 can be manufactured at low cost.

  A first modification of the seismic isolation member provided in the seismic isolation device 1 is shown in FIG. The seismic isolation member 50 according to the first modified example is formed with one through hole 53 through which the bolt 40 passes in the bracket portion 51 provided at one end portion thereof, and the bracket portion 52 provided at the other end portion. In addition, one through hole 54 through which the bolt 40 passes is formed. The seismic isolation member 50 is fixed to the first connecting plate 20 with one bolt 40 and is similarly fixed to the second connecting plate 30 with one bolt 40.

  In the seismic isolation member 50 described above, if the number of bolts 40 as the fixing means for the connecting plates 20 and 30 is one, the fixing strength for the connecting plates 20 and 30 cannot be denied, but the above assumption is assumed. When vibrations other than directions are applied to the seismic isolation device 1, there is an advantage that the bolt is difficult to loosen. Moreover, since the number of parts which comprise the seismic isolation apparatus 1 decreases, manufacturing cost can be reduced.

  A second modification of the seismic isolation member provided in the seismic isolation device 1 is shown in FIG. Three seismic isolation members 60 as a second modification are formed in a bracket portion 61 provided at one end thereof so that three through-holes 63 through which bolts 40 pass are positioned at three vertices of a triangle. Similarly, three through holes 64 through which the bolts 40 are passed are also formed in the bracket portion 62 provided at the end portion. The seismic isolation member 60 is fixed to the first connecting plate 20 with three bolts 40, and similarly fixed to the second connecting plate 30 with three bolts 40.

  In the seismic isolation member 60 described above, the strength of fixing the connection plates 20 and 30 can be increased by increasing the number of bolts 40 as fixing means for the connection plates 20 and 30. Moreover, since the bolt 40 is disposed so as to be positioned at the three apexes of the triangle, when vibrations other than the assumed direction act on the seismic isolation device 1, than those fixed with two bolts. Bolts are difficult to loosen, and the number of bolts increases, so there are advantages such as the size of each bolt can be reduced.

  A third modification of the seismic isolation member provided in the seismic isolation device 1 is shown in FIG. The bracket parts 71 and 72 provided at both ends of the seismic isolation member 70 as the third modified example are not formed with through holes for passing bolts. And the one bracket part 71 is fixed to the 1st connection board 20 by welding. Although not shown, the other bracket portion 72 is fixed to the second connecting plate 30 by welding. A bead 73 is formed between the bracket portion 71 (or the bracket portion 72) and the first connecting plate 20 (or the second connecting plate 30).

  In the said seismic isolation member 70, the fixed strength with respect to the connection plates 20 and 30 can be raised. Moreover, since the number of parts which comprise the seismic isolation apparatus 1 decreases, manufacturing cost can be reduced.

  FIG. 7 is a perspective view showing a first modification of how the seismic isolation member 10 is fixed to the first connecting plate 20 (or the second connecting plate 30) in the seismic isolation device 1 described above. In the first modified example, a counterbore (a book) that fits a bracket portion 13 provided at one end 11 of the seismic isolation member 10 on a side surface of the first connecting plate 20 to which the seismic isolation member 10 is fixed. (Corresponding to the recess of the invention) 22 is formed. Then, one bracket portion 13 of the seismic isolation member 10 is fitted into the counterbore 22, and then passed through a through hole 15 formed in the bracket portion 13, and the first connecting plate is passed through the bolt 40. 20 is fixed. Although not shown, the bracket portion 14 provided on the other end portion 12 of the seismic isolation member 10 is also formed in the bracket portion 14 after being fitted into the spot facing formed on the second connecting plate 30. Bolts 40 are passed through the through holes 16 and are fixed to the second connecting plate 30 via the bolts 40.

  In the above-described seismic isolation device 1, by fitting one bracket portion 13 of the seismic isolation member 10 into the spot facing 22 formed on the first connecting plate 20 and fixing both, The fixing strength with respect to the first connecting plate 20 can be increased. Similarly, the other bracket portion 14 of the seismic isolation member 10 is fitted into the spot facing formed on the second coupling plate 30 and then fixed to the second coupling plate 30 to fix the seismic isolation member 10 to the second coupling plate 30. Strength can be increased. In addition, since a part of the force generated in the seismic isolation member 10 can be directly transmitted to the first connecting plate 20 by the supporting pressure acting on the contact surface between the bracket portion and the counterbore, the force applied by the bolt 40 is reduced. Is done. Thereby, the diameter of the bolt 40 can be reduced, or the number of the bolts 40 can be reduced.

  FIG. 8 is a perspective view showing a second modification of how the seismic isolation member 10 is fixed to the first connecting plate 20 (or the second connecting plate 30) in the seismic isolation device 1 described above. In the second modification, a U-shaped auxiliary member 23 is fixed to a side surface of the first connecting plate 20 to which the seismic isolation member 10 is fixed by means such as welding. A recess 24 corresponding to the spot facing 22 of the first modification is formed by the inner side surface of the auxiliary member 23 and the side surface of the first connecting plate 20 exposed so as to be surrounded by the side surface. And one bracket part 13 of the seismic isolation member 10 is being fixed to the 1st connection board 20 via the volt | bolt 40, after being inserted in the recessed part 24. FIG. Although not shown, the bracket portion 14 provided on the other end portion 12 of the seismic isolation member 10 is also fitted in the recess formed in the second connection plate 30 and then connected to the second connection via the bolt 40. It is fixed to the plate 30.

  In the seismic isolation device 1 described above, the fixing strength of the seismic isolation member 10 to the first connection plate 20 and the fixing strength of the seismic isolation member 10 to the second connection plate 30 can be increased. Moreover, the force borne by the bolt 40 is reduced. Thereby, the effect similar to the above is acquired.

  By the way, in the said embodiment, only the X direction (both positive and negative directions) in FIG. 2 is assumed as a vibration direction of a superstructure, and the seismic isolation member is arrange | positioned along the direction. However, as shown in FIGS. 9 and 10, a plurality of directions, for example, the X direction (both positive and negative directions) and the Y direction (both positive and negative directions) orthogonal to the X direction may be assumed as the vibration direction of the superstructure. . Specifically, the seismic isolation device 101 shown in FIGS. 9 and 10 includes eight seismic isolation members 10, a first connecting plate 120 to which one end 11 of each seismic isolation member 10 is fixed, and each seismic isolation device. And a second connecting plate 130 to which the other end 12 of the seismic member 10 is fixed.

  The first connecting plate 120 is a rectangular steel plate having a uniform thickness, and one end 11 of each seismic isolation member 10 is fixed to the upper surface of the first connecting plate 120 via bolts 40. A bolt hole (not shown) for screwing the bolt 40 is formed on the upper surface of the first connecting plate 120. A plurality of stud bolts 21 are erected on the lower surface of the first connecting plate 120.

  The second connecting plate 130 is also a rectangular steel plate having a uniform thickness, and the other end 12 of each seismic isolation member 10 is fixed to the lower surface of the second connecting plate 130 via bolts 40. A bolt hole (not shown) for screwing the bolt 40 is formed on the lower surface of the second connecting plate 130. A plurality of stud bolts 31 are erected on the upper surface of the second connecting plate 30.

  Of the eight seismic isolation members 10, the two seismic isolation members 10 </ b> C are arranged at equal intervals along the side 120 a with the first connecting plate 120, and are directed in a direction orthogonal to the side 120 a. In addition, one end 11 is fixed to the upper surface of the first connecting plate 20 via a bolt 40. Furthermore, these two seismic isolation members 10C are arranged at equal intervals along the side 130a with the second connecting plate 130 and oriented in a direction orthogonal to the side 130a, and the other end. The part 12 is fixed to the lower surface of the second connecting plate 130 via bolts 40.

  Two seismic isolation members 10D different from the above among the eight seismic isolation members 10 are arranged at equal intervals along the side 120b adjacent to the side 120a to which the seismic isolation member 10C is fixed. One end portion 11 is fixed to the upper surface of the first connecting plate 120 via a bolt 40 after being oriented in a direction orthogonal to 120b. Further, these two seismic isolation members 10D are arranged at equal intervals along the side 130b adjacent to the side 130a to which the seismic isolation member 10C is fixed, and are directed in a direction orthogonal to the side 130b. Thus, the other end 12 is fixed to the lower surface of the second connecting plate 130 via a bolt 40.

  Of the eight seismic isolation members 10, two seismic isolation members 10E different from the above are arranged at equal intervals along the side 120c adjacent to the side 120b to which the seismic isolation member 10D is fixed. One end portion 11 is fixed to the upper surface of the first connecting plate 120 via a bolt 40 after being oriented in a direction orthogonal to 120c. Further, these two seismic isolation members 10E are arranged at equal intervals along the side 130c adjacent to the side 130b to which the seismic isolation member 10D is fixed, and are directed in a direction orthogonal to the side 130c. Thus, the other end 12 is fixed to the lower surface of the second connecting plate 130 via a bolt 40.

  Among the eight seismic isolation members 10, the remaining two seismic isolation members 10F are arranged at equal intervals along the side 120d adjacent to the side 120c to which the seismic isolation member 10E is fixed, and with respect to the side 120d. Then, one end portion 11 is fixed to the upper surface of the first connecting plate 120 via a bolt 40. Further, these two seismic isolation members 10F are arranged at equal intervals along the side 130d adjacent to the side 130c to which the seismic isolation member 10E is fixed, and are directed in a direction orthogonal to the side 130d. Thus, the other end 12 is fixed to the lower surface of the second connecting plate 130 via a bolt 40.

The two seismic isolation members 10 </ b> C and the other two seismic isolation members 10 </ b> E are fixed to the first connecting plate 120 and the second connecting plate 130. The seismic isolation member 10 </ b> C is disposed so that the curved portions thereof protrude in a certain direction (the positive direction of X in FIG. 10) from between the first connecting plate 120 and the second connecting plate 130. 10E is arranged so that those curved portions protrude from between the first connecting plate 120 and the second connecting plate 130 in the direction opposite to the direction of the seismic isolation member 10C (the negative direction of X in FIG. 10). Has been.
Further, the two seismic isolation members 10D and the other two seismic isolation members 10F are fixed to the first connecting plate 120 and the second connecting plate 130. The seismic isolation member 10 </ b> D is disposed so that the curved portions thereof protrude in a certain direction (the positive direction of Y in FIG. 10) from between the first coupling plate 120 and the second coupling plate 130. 10F is arranged so that those curved portions protrude from between the first connecting plate 120 and the second connecting plate 130 in the direction opposite to the direction of the seismic isolation member 10D (the negative direction of Y in FIG. 10). Has been.
The first connecting plate 120 and the second connecting plate 130 are arranged so that all four sides coincide when viewed from above.

According to the seismic isolation device 101, the direction of the input vibration is assumed in advance, and the seismic isolation member 10 is aligned along the two assumed directions (the direction of the double arrow X and the direction of the double arrow Y in FIG. 10). By arranging in such a manner, the vibration of the superstructure generated in the assumed two directions can be effectively damped. In other words, it is not assumed that energy is input from all directions to the superstructure, but it is assumed that energy is input only from a specific direction. There is no need for detailed consideration when designing 10. Moreover, since detailed restrictions are not imposed on the shape of the seismic isolation member 10, it is not necessary to increase the processing accuracy of the seismic isolation member 10 as much as in the past.
Therefore, the production efficiency of the seismic isolation device 101 can be increased both in the design stage and in the manufacturing stage, and as a result, the seismic isolation device 1 can be manufactured at low cost.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to said embodiment. Additions, omissions, substitutions, and other modifications can be made without departing from the spirit of the present invention. The present invention is not limited by the above description, but only by the scope of the appended claims.

For example, in the above embodiment, the seismic isolation device is disposed on the lower structure, the seismic isolation device is fixed to the lower structure, and then the upper structure is disposed on the seismic isolation device. Secure the seismic device to the superstructure. However, in the construction method of the seismic isolation device according to the present invention, the seismic isolation device is arranged on the lower structure, and the seismic isolation member is placed along the direction of vibration assumed in advance of the upper structure with respect to the lower structure. A step of disposing, a step of fixing the seismic isolation device to the lower structure, a step of disposing the upper structure on the seismic isolation device, and a step of fixing the seismic isolation device to the upper structure. Can be included. Therefore, the order in which the above steps are performed is not limited to the order described above.
Moreover, the seismic isolation device of the present invention is not only disposed between the foundation (lower structure) and the fuselage (upper structure) in structures such as buildings, bridges, elevated roads, elevated railways, etc. You may arrange | position between the members which comprise a structure. For example, you may arrange | position between the floor slab which comprises a building, and the floor slab laid on a floor slab. In this example, the seismic isolation device absorbs energy acting on the floor slab, not energy acting on the structure body. Similarly, you may install between the bridge pier which comprises a bridge, and the bridge girder installed on a bridge pier.

The present invention relates to a seismic isolation device for attenuating vibration of an upper structure of a structure relative to the lower structure of the structure, the seismic isolation member having a U-shape, and one end of the seismic isolation member It is related with a seismic isolation apparatus provided with the 1st connecting plate to which a part is fixed, and the 2nd connecting plate to which the other end of the seismic isolation member is fixed. Among the plurality of seismic isolation members, some seismic isolation members are arranged in a predetermined direction between the first connection plate and the second connection plate. The remaining seismic isolation members are arranged between the first connecting plate and the second connecting plate in a direction opposite to the predetermined direction.
According to the present invention, the production efficiency of the seismic isolation device can be increased both in the design stage and in the manufacturing stage, and as a result, the seismic isolation device can be manufactured at low cost.

1 ... Seismic isolation device,
10, 10A, 10B ... seismic isolation member,
13, 14 ... Bracket part,
20 ... 1st connection board,
22 ... Counterbore (corresponding to the recess of the present invention),
24 ... recess,
30 ... the second connecting plate,
40 ... Bolt,
50, 60, 70 ... seismic isolation members,
A ... Superstructure,
B ... Substructure

Claims (9)

A seismic isolation device that attenuates the vibration of the upper structure of the structure relative to the lower structure of the structure,
A plurality of seismic isolation members having a U-shape;
A first connecting plate to which one end of the seismic isolation member is fixed;
A second connecting plate to which the other end of the seismic isolation member is fixed;
Among the plurality of seismic isolation members, some seismic isolation members are arranged in a predetermined direction between the first connection plate and the second connection plate, and the remaining seismic isolation members are A seismic isolation device disposed between the first connecting plate and the second connecting plate in a direction opposite to the predetermined direction.   The seismic isolation device according to claim 1, wherein both ends of the seismic isolation member are fixed to the first and second connecting plates with bolts, respectively.   The bolts are respectively provided at one end of the seismic isolation member and the first connecting plate, and at the other end of the seismic isolation member and the second connecting plate. The seismic isolation device according to claim 2 provided one by one.   A plurality of bolts are provided on each of the fixed portion between the one end portion of the seismic isolation member and the first connecting plate and the fixing portion between the other end portion of the seismic isolation member and the second connecting plate. The seismic isolation device according to claim 2 provided one by one.   The seismic isolation device according to claim 1, wherein both ends of the seismic isolation member are welded to the first and second connecting plates, respectively. In each of the first and second connecting plates, a recess for fitting one or the other end of the seismic isolation member is formed, respectively.
The both ends of the said seismic isolation member are each being fixed to said 1st and 2nd connection board, after being each fitted in the said recessed part, The immunity as described in any one of Claim 1 to 5 Seismic device.   7. The isolator according to claim 1, further comprising an isolator in which metal plates and plate-like elastic bodies are alternately stacked, wherein the isolator is disposed between the upper structure and the lower structure. Seismic isolation device. A first connection plate fixed to the lower structure of the structure, a second connection plate fixed to the upper structure of the structure opposite to the lower structure, and the first connection plate and the second connection plate And a plurality of seismic isolation members fixed to the first connection plate and the second connection plate so as to be disposed in a predetermined direction and in a direction opposite to the predetermined direction. A construction method for arranging a device in the lower structure and the upper structure,
Disposing the seismic isolation device on the lower structure so that the seismic isolation member follows a presumed vibration direction of the upper structure relative to the lower structure;
Fixing the seismic isolation device to the lower structure;
Disposing the superstructure on the seismic isolation device;
A method of constructing the seismic isolation device, including the step of fixing the seismic isolation device to the superstructure. A seismic isolation member that is arranged between the upper structure and the lower structure of the structure and attenuates the vibration of the upper structure with respect to the lower structure that occurs in a previously assumed direction by plastic deformation of itself.
Having a U-shape,
It is arranged between the upper structure and the lower structure along the assumed direction of vibration, and one end is fixed to the lower structure and the other end is fixed to the upper structure. Seismic member.

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