JP2018040120A - Damper system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damper system with an impact mitigation structure for preventing generation of a large impact between a damper tip part and a fitting member to a structure.SOLUTION: A damper system 100 according to an embodiment 1 is the damper system 100 provided between two different structural members constituting a structure that are relatively displaced, and includes: a damper 20 absorbing energy from relative displacement between a superstructure 11 and a substructure 12a; a fitting part 30 fitted respectively on the superstructure 11 and the substructure 12a for supporting an edge part of the damper 20; an elastic member 40 generating reactive force in response to relative displacement between the damper 20 and the fitting part 30; a slit 32 provided on either of an edge part 21 or the fitting part 30; and a shaft 23 provided on the other of the edge part 21 or the fitting part 30, to be engaged with the slit 32. The slit 32 includes a contact part 36 coming in contact as the shaft 23a is displaced along the slit 32. The elastic member 40 is disposed between the shaft 23a and the contact part 36.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a damper system including an impact force mitigating structure for a mounting portion of a damper attached to a structure.

  Seismic control that absorbs seismic energy to improve the earthquake resistance of civil engineering structures such as bridges and sluices and building structures such as buildings, warehouses, and towers (the civil engineering structures and building structures are collectively referred to as structures) A damper is used. By providing a damping damper, the stress and deformation generated in the structure during an earthquake are reduced. Thereby, the safety | security which can endure a bigger earthquake force is ensured, reducing the cross section of the member which comprises a structure, and also the cost and construction period of a structure are reduced. The damping damper is also used for seismic reinforcement of existing structures, and is used to reduce the cost and construction time required to reinforce existing structures. Such a vibration damping damper is attached between two different members constituting the structure. The damping damper is deformed by the relative displacement between two different members caused by the earthquake, and absorbs the seismic energy applied to the structure.

  As disclosed in Patent Document 1, a damping damper is provided between the upper structure and the lower structure of the bridge. A gap is provided between the end of the damping damper and the mounting member to the bridge so that the damping damper does not operate due to the relative movement between the upper structure and the lower structure of the bridge due to a small-scale earthquake. As a result, there is no reaction force by the damping damper against normal temperature expansion and contraction or bending of the girder, and the damping damper does not deform. Since no load is applied to the members constituting the, the safety is improved as compared with the vibration control damper that does not have a gap between the mounting members.

Japanese Patent Laying-Open No. 2015-232254

  The seismic damper disclosed in Patent Document 1 has a gap provided between the end of the damper and the mounting member. However, when a large-scale earthquake occurs, a relative speed is generated between the end portion of the damper and the mounting member due to the displacement between the upper structure to which the damping damper is attached and the lower structure. When the displacement between the upper structure and the lower structure is large, the gap provided between the damper end and the mounting member is clogged (becomes 0). At that time, the damper end and the mounting member have a relative speed. It will collide with it. Due to this collision, a large impact force is applied to the damper end and the mounting member, breaking of the damping damper, large deformation, pulling out of the anchor that attaches the damping damper to the mounting member, and damage to the bridge body to which the damping damper is attached. There was a problem that occurred.

  This invention solves the said problem, Comprising: It aims at providing the damper system provided with the impact-force mitigation structure which a big impact force does not generate | occur | produce between a damper edge part and the attachment member to a structure. .

  The damper system according to the present invention is a damper system provided between two relatively displaceable different structural members constituting a structure, the damper absorbing energy due to the relative displacement of the two structural members, An attachment portion that is attached to each of the two structural members and supports an end portion of the damper; an elastic member that generates a reaction force with respect to a relative displacement between the damper and the attachment portion; A slit provided in one of the mounting portions, and a shaft that is provided in the other of the end portion or the mounting portion and that fits into the slit, and the slit has the shaft along the slit. An abutting portion that abuts by being displaced is provided, and the elastic member is disposed between the shaft and the abutting portion.

  According to the damper system according to the present invention, when vibration is applied to a structure such as a bridge due to a large-scale earthquake or the like, the elastic member acts as a buffer member and suppresses shock force from being applied to the damper system. Can do. In addition, since a gap is formed between the shaft and the abutment portion, the dimensional change due to the temperature of the environment in which the structure is installed and the small and medium sizes within the design range of the structure are normal. The vibration is not applied to the damper system due to vibrations caused by earthquakes of scale, etc., so that the damper does not operate. Therefore, the damper system is highly reliable because the damper does not break down due to fatigue for a long period of time, or an excessive load is applied to the structure to cause deformation.

It is explanatory drawing which shows an example of the damper system which concerns on Embodiment 1 of this invention. It is an enlarged view of the damper system of FIG. It is the figure which showed only the damper among the damper systems of FIG. It is a figure explaining operation | movement of a damper system. It is a figure which shows an example of the damper system in which the elastic member is not provided as a comparative example. It is the schematic diagram which showed the change of the force added to an axis | shaft in the damper system of FIG. FIG. 5 is a schematic diagram showing a change in force applied to the shaft in the damper system of FIG. 4. It is an enlarged view of the damper system which concerns on Embodiment 2 of this invention. It is an enlarged view of the damper system concerning Embodiment 3 of the present invention.

[Embodiment 1]
FIG. 1 is an explanatory diagram showing an example of a damper system 100 according to Embodiment 1 of the present invention. In addition, each part is shown typically, and the present invention is not limited to the illustrated form (shape and relative size). In addition, when there is no need to particularly distinguish or specify a plurality of the same type of components that are distinguished by subscripts, the subscripts may be omitted and described. In each embodiment, the damper system 100 attached to the bridge will be described. However, the damper system 100 may be installed between different structural members constituting the structure. For example, the damper system 100 is applied not only to bridges but also to civil engineering structures and building structures such as sluices, buildings, warehouses, and towers (hereinafter, the civil engineering structures and building structures are collectively referred to as “structures”). You may do it.

  In FIG. 1, a damper system 100 is mounted between, for example, a bridge upper structure 11 and a lower structure 12a. The upper structure 11 is mounted on lower structures 12a and 12b such as abutments, for example, and is mounted via a movable support 13 or a fixed support 14. The movable support 13 is configured to receive only a downward load from the upper structure 11 and not to receive a horizontal load. The fixed support 14 is structured to receive a downward load and a horizontal load by the upper structure 11. For example, a roller or the like is employed as the movable support 13, and the roller is not restrained by rotation of the upper structure 11 in the horizontal direction, and receives a load only in the downward direction. The fixed support 14 has, for example, a hinge structure, and can rotate around the axis of the hinge, but cannot be displaced in the horizontal direction and the vertical direction. In the first embodiment, the downward load is, for example, the weight of the upper structure 11 or a vehicle traveling on a bridge.

  The damper system 100 is installed, for example, between an attachment member 16 provided so as to protrude below the upper structure 11 and the lower structure 12a. The upper structure side mounting surface 17 to which the damper system 100 on the mounting member 16 side is mounted and the lower structure side mounting surface 18 to which the damper system 100 on the lower structure 12a side is mounted are provided facing each other. The upper structure 11 is placed on the lower structure 12 a via the movable support 13. Therefore, even if the upper structure 11 is displaced in the horizontal direction, the movable support 13 does not receive a load in the horizontal direction. However, when the upper structure 11 is displaced in the horizontal direction, the attachment member 16 is also displaced in the horizontal direction. Therefore, if the distance between the opposing surfaces of the lower structure side mounting surface 18 of the lower structure 12a and the upper structure side mounting surface 17 of the mounting member 16 is L, the upper structure 11 moves by d in the left direction in FIG. Then, the distance L is reduced by a. Further, when the upper structure 11 moves by a in the right direction in FIG. 1, the distance L increases by a. For example, when vibration due to an earthquake is applied to the upper structure 11 of the bridge, the upper structure 11 is displaced in the horizontal direction, and the distance L expands and contracts.

  FIG. 2 is an enlarged view of the damper system 100 of FIG. FIG. 3 is a view showing only the damper 20 in the damper system 100 of FIG. The damper system 100 includes a damper 20 and mounting portions 30 a and 30 b that support both ends of the damper 20. The attachment portion 30a is attached to the lower structure side attachment surface 18 on the lower structure 12a side. The attachment portion 30b is attached to the upper structure side attachment surface 17 on the upper structure 11 side.

  The attachment portion 30b supports the end portion 21b of the damper 20 on the upper structure 11 side. In the first embodiment, a shaft support hole 38 is opened in each of the mounting plate 31ba and the mounting plate 31bb of the mounting portion 30b. A through hole 22b is provided in the end portion 21b of the damper 20 on the upper structure 11 side. The shaft 23b is passed through the shaft support hole 38 and the through hole 22b, and the end portion 21b of the damper 20 is rotatably supported by the mounting portion 30b.

  Further, the attachment portion 30a supports the end portion 21a of the damper 20 on the lower structure 12a side. In the first embodiment, for example, a slit 32a is provided in each of the mounting plate 31ba and the mounting plate 31bb of the mounting portion 30a. The end portion 21a on the lower structure 12a side of the damper 20 is provided with a through hole 22a in the same manner as the other end portion 21b. The shaft 23a is passed through the slit 32a and the through hole 22a, the end 21a of the damper 20 is rotatable with respect to the mounting portion 30a, and the end 21a of the damper 20 can be relatively displaced in the horizontal direction with respect to the mounting portion 30a. It is supported with a predetermined gap.

(Mounting part 30)
The mounting portion 30a includes a substrate 37a that is fixed to the lower structure side mounting surface 18 of the lower structure 12a. A mounting plate 31aa and a mounting plate 31ab are erected from the substrate 37a. The mounting plate 31aa and the mounting plate 31ab are formed to have the same shape. The mounting plate 31aa and the mounting plate 31ab are erected in parallel with each other. A predetermined gap is provided between the inner side surface 34aa and the inner side surface 34ab, which are the inner surfaces where the mounting plate 31aa and the mounting plate 31ab face each other, so that the end 21a of the damper 20 can be inserted.

  In the mounting plate 31aa and the mounting plate 31ab, a slit 32 is opened so as to penetrate each of the flat mounting plate 31aa and the mounting plate 31ab. The slit 32 opened in the mounting plate 31aa is called a slit 32a, and the slit 32 opened in the mounting plate 31ab is called a slit 32b. The slit 32 is set to such a width that the shaft 23a can be fitted into the slits 32a and 32b and the shaft 23a can move along the longitudinal direction of the long hole shape. The shaft 23 a is also fitted with a through hole 22 a provided in the end portion 21 a of the damper 20. With this structure, the end portion 21a of the damper 20 can be moved in the direction along the slit 32 and is rotatably supported by the mounting portion 30a. In the first embodiment, the longitudinal direction of the slit 32 is preferably formed in parallel with the longitudinal direction of the damper 20. Note that the longitudinal direction of the slit 32 is not necessarily parallel to the longitudinal direction of the damper 20. When the upper structure 11 and the lower structure 12a are relatively displaced, the end portion 21a has a margin to move, and the relative displacement between the upper structure 11 and the lower structure 12a reaches a predetermined amount. It is sufficient that a load is applied to the damper 20 sometimes.

  Abutting portions 36 are formed at both ends in the longitudinal direction of the slit 32. In the slit 32a provided in the mounting plate 31aa, the contact portion 36aa is located on the lower structure 12a side, and the contact portion 36ab is located on the upper structure 11 side, that is, the side where the damper 20 is located. Similarly, in the slit 32b provided in the mounting plate 31ab, the contact portion 36ba is located on the lower structure 12a side, and the contact portion 36bb is located on the upper structure 11 side, that is, the side where the damper 20 is located.

  The contact portion 36 is formed in an arc shape whose diameter is the width (dimension in the short direction) of the slits 32a and 32b, but is not limited to this shape. For example, the abutting portion 36 may be a flat surface as long as the load from the shaft 23a can be received when the shaft 23a abuts. In addition, it is desirable that the shape be less likely to be damaged when a load is applied from the shaft 23a to the contact portion 36.

  The attachment portion 30 b includes a substrate 37 b that is attached to the upper structure side attachment surface 17 of the upper structure 11. A mounting plate 31ba and a mounting plate 31bb are erected from the substrate 37b. The mounting plate 31ba and the mounting plate 31bb are formed to have the same shape. The mounting plate 31ba and the mounting plate 31bb are erected in parallel with each other. The inner side surface 34ba and the inner side surface 34bb, which are inner surfaces where the mounting plate 31ba and the mounting plate 31bb face each other, have a predetermined gap so that the end portion 21b of the damper 20 can be inserted.

  A shaft support hole 38 is opened in the mounting plate 31ba and the mounting plate 31bb so as to penetrate each of the flat mounting plate 31ba and the mounting plate 31bb. The shaft support hole 38 opened in the mounting plate 31ba is called a shaft support hole 38a, and the shaft support hole 38 opened in the mounting plate 31bb is called a shaft support hole 38b. In the shaft support hole 38, the shaft 23 b is fitted in the shaft support hole 38, and the shaft 23 b is also fitted in the through hole 22 b in the end portion 21 b of the damper 20. With this structure, the end portion 21b of the damper 20 is rotatably supported.

(Elastic member 40)
An elastic member 40aa and an elastic member 40ab are attached to the outer surface 35aa outside the attachment plate 31aa. The elastic member 40aa is located between the contact portion 36aa of the slit 32a and the shaft 23a. The elastic member 40ab is located between the contact portion 36ab of the slit 32a and the shaft 23a. An elastic member 40ba and an elastic member 40bb are attached to the outer surface 35ab outside the attachment plate 31ab. The elastic member 40ba is located between the contact portion 36ba of the slit 32b and the shaft 23a. The elastic member 40bb is located between the contact portion 36bb of the slit 32b and the shaft 23a. For example, when the shaft 23a moves to the lower structure 12a side, the shaft 23a hits the elastic member 40aa and the elastic member 40ba before contacting the contact portion 36aa and the contact portion 36ba. Further, when the shaft 23a moves to the upper structure 11 side, the shaft 23a contacts the elastic member 40ab and the elastic member 40bb before contacting the contact portion 36ab and the contact portion 36bb. As described above, the structure on the attachment plate 31aa side and the structure on the attachment plate 31ab side are symmetrically arranged with respect to the center axis of the damper and have the same structure.

  More specifically, in the first embodiment, the shaft 23a protrudes outward from the slit 32a and the slit 32b. The projecting portion 24a, which is a projecting portion of the shaft 23a, is positioned alongside the elastic member 40aa and the elastic member 40ab along the outer surface 35aa of the mounting plate 31aa, and the projecting portion 24a when the shaft 23a moves along the slit 32a. And the elastic member 40aa or the elastic member 40ab abut. The projecting portion 24a, which is a projecting portion of the shaft 23a, is positioned alongside the elastic member 40aa and the elastic member 40ab along the outer surface 35aa of the mounting plate 31aa, and the projecting portion 24a when the shaft 23a moves along the slit 32a. And the elastic member 40aa or the elastic member 40ab abut. When the shaft 23a contacts the elastic member 40aa, the through portion 26a located inside the slit 32a of the shaft 23a does not contact the contact portion 36aa. That is, the elastic member 40 is disposed between the shaft 23 a and the contact portion 36 in the direction in which the end 21 a of the damper 20 can move, that is, in the longitudinal direction of the slit 32. In the first embodiment, the elastic member 40 is arranged side by side along the protruding portion 24 of the shaft 23 and the outer surface 35 of the mounting plate 31, but is not limited thereto. The elastic member 40 only needs to be positioned between the shaft 23a and the contact portion 36 in the direction in which the shaft 23a can move. In the first embodiment, the elastic member is arranged on the outer surface 35 of the mounting plate 31. However, with this configuration, it is easy to find the damage and deterioration of the elastic member 40, and it is easy to replace it. There are advantages.

  The elastic member 40 is configured by, for example, a leaf spring. An end portion of a steel material to be a leaf spring is fixed to the mounting plate 31 and fixed so that the shaft 23a bends in a direction in which the shaft 23a moves along the slit 32 (that is, the longitudinal direction of the slit 32). The elastic member 40 is configured to give a reaction force to the movement of the shaft 23. In addition, although the elastic member 40 is comprised by the leaf | plate spring, the other elastic body which produces a reaction force with respect to the axis | shaft 23a with an elastic force may be sufficient. The means for fixing the elastic member 40 to the mounting plate 31 is not particularly limited, but the elastic member 40 can be easily replaced if it can be attached and detached. For example, the elastic member 40 may be fixed by a screw that is fastened to the mounting plate 31.

(Damper 20)
In the first embodiment, the damper 20 is a buckling-restrained damper. The buckling-restrained damper includes end portions 21 a and 21 b at both ends, an axial force member 29 connected to the end portions 21 a and 21 b, and an outer peripheral surface of the axial force member 29 so as to surround the axial force member 29. It is comprised by the stiffening tube 25 which suppresses generation | occurrence | production of buckling. However, the damper 20 is not limited to a buckling-restrained damper, and, for example, attenuates the relative displacement between the upper structure 11 and the lower structure 12a by plastic deformation of a metal such as steel, and absorbs energy due to the relative displacement. Other types of dampers may be used if any.

  One end portion 21a of the damper 20 is provided with a through hole 22a through which the shaft 23a passes. The other end 21b of the damper 20 is provided with a through hole 22b through which the shaft 23b passes. The damper 20 is supported by the mounting portion 30 by passing the shaft 23 through the through hole 22a and the through hole 22b. The shaft 23 is fitted into the through hole 22 with a gap, for example, but may be fixed by an interference fit. Further, it may be fixed by other means.

(About operation of damper system 100)
FIG. 4 is a diagram for explaining the operation of the damper system 100, and is an enlarged view of the periphery of the end portion 21a of the damper 20 of FIG. The operation of the damper system 100 will be described based on FIG. In addition, although description of operation | movement of the damper system 100 demonstrates only the structure by the side of the attachment plate 31aa, it operate | moves similarly also at the attachment plate 31ab side.

  As shown in FIG. 4A, the damper system 100 is normally installed so that the shaft 23a is around the central portion in the longitudinal direction of the slit 32a. For example, the bridge has an upper structure 11 and a lower structure 12a due to vibration of a vehicle or the like traveling on the upper structure 11, a change in the temperature of the environment in which the bridge is installed, and a relatively frequent small-scale earthquake. And the distance L changes. Therefore, the shaft 23a is installed so as to be disposed around the central portion of the slit 32a, and the shaft 23a and the contact portions 36aa, 36ab are separated from each other. As a result, a load is not applied to the damper 20 due to vibrations caused by running of the vehicle running on the bridge and changes in the distance L due to temperature changes. The dimension in the longitudinal direction of the slit 32a is determined in consideration of the amount of change in the distance L during normal times. Further, the distance from the normal shaft 23a to the elastic member 40aa and the elastic member 40ab is a distance d. The elastic member 40aa is disposed on the side closer to the shaft 23a by a distance b from the contact portion 36aa of the slit 32a. The elastic member 40ab is disposed on the side closer to the shaft 23a by a distance b from the contact portion 36ab of the slit 32a. In FIG. 4, the distance b and the distance d are set equal on the elastic member 40aa side and the elastic member 40ab side, but different distances b and distances are obtained by changing the positions of the elastic member 40aa and the elastic member 40ab. You may set to d.

  FIG. 4B is a diagram showing a state when vibration is applied to the bridge due to a large-scale earthquake or the like, and particularly shows a state where the upper structure 11 approaches the lower structure 12a and the distance L in FIG. 1 is shortened. . At this time, the distance L is shortened by the moving distance a. The moving distance a is longer than the distance d, the shaft 23a is in contact with the elastic member 40aa, and the elastic member 40ab is elastically deformed. The shaft 23a is in contact with the contact portion 36aa of the slit 32a.

  FIG. 4C is a diagram illustrating a state when vibration is applied to the bridge due to a large-scale earthquake or the like. In particular, the upper structure 11 is moved away from the lower structure 12a, and the distance L in FIG. 1 is increased. . At this time, the distance L is increased by the moving distance a. The moving distance a is longer than the distance d, the shaft 23a is in contact with the elastic member 40ab, and the elastic member 40ab is elastically deformed. The shaft 23a is in contact with the contact portion 36ab of the slit 32a.

  FIG. 5 is a diagram illustrating an example of a damper system 100a in which the elastic member 40 is not provided as a comparative example. In addition, although description of operation | movement of the damper system 100a demonstrates only the structure by the side of the attachment plate 31aa, it operate | moves similarly also at the attachment plate 31ab side. Since the damper system 100a is not provided with the elastic member 40, when the distance L in FIG. 1 is increased or decreased by the moving distance a, the shaft 23a directly contacts the contact portion 36aa or the contact portion 36bb. When the upper structure 11 and the lower structure 12a approach or separate at a speed due to vibration applied to the upper structure 11 and the lower structure 12, the shaft 23a and the contact part 36aa or the contact part 36bb instantaneously move. Abut. Then, an impact force is applied to the shaft 23a and the contact portion 36aa or the contact portion 36bb.

  FIG. 6 is a schematic diagram showing a change in force applied to the shaft 23a in the damper system 100a of FIG. In the following description, the case where the shaft 23a contacts the contact portion 36aa in the structure on the mounting plate 31aa side will be described, but the same applies to the case where the shaft 23a contacts the contact portions 36ab, 36ba, and 36bb. . The horizontal axis of FIG. 6 represents the amount of displacement from the initial position of the shaft 23a, and the vertical axis of FIG. 6 represents the load applied to the shaft 23a. A solid line represents a change in force applied to the shaft 23a when the shaft 23a and the contact portion 36aa are in static contact. The dotted line schematically represents the force applied to the shaft 23a when the shaft 23a and the contact portion 36aa contact each other with a relative speed.

  In the damper system 100a, when the shaft 23a moves by the moving distance a, the damper 20a starts to act. That is, the shaft 23a and the contact portion 36aa come into contact with each other, and a load is applied to the damper 20a from the upper structure 11 and the lower structure 12a. When the shaft 23a and the contact portion 36 are in static contact with each other, for example, when a load is applied from the shaft 23a to the contact portion 36aa over a long time, the damper system moves when the shaft 23a moves by the moving distance a. A load is applied to 100a, and each part of the damper system 100a that receives the load is elastically deformed. Specifically, the attachment portion 30a, the attachment portion 30b, the shaft 23a, the end portion 21a, the end portion 21b, the axial force member 29, and the like are elastically deformed. At this time, the force F applied to the shaft 23a increases in proportion to the deformation amount δ of the damper system 100a. When the deformation amount δ of the damper system 100a increases and reaches the elastic limit of the damper 20, the force F applied to the shaft 23a becomes a substantially constant force Fy. At this time, for example, the axial force member 29 constituting the damper 20 that is a buckling-restrained damper yields and plastically deforms. A deformation amount of the damper system 100a at this time is defined as a deformation amount δy. When the axial force member 29 begins to be plastically deformed, the load becomes substantially constant even when the deformation amount δ increases, and the damper system 100a absorbs energy due to vibration applied to the bridge or the like and suppresses vibration.

  On the other hand, a change in the force applied to the contact portion 36aa when an impact force is applied to the damper system 100a will be described. When vibration is applied to the upper structure 11 and the lower structure 12a due to an earthquake or the like, the shaft 23a moves with a relative speed with respect to the contact portion 36aa. When the relative movement distance due to the vibration of the upper structure 11 and the lower structure 12a exceeds the movement distance a, the shaft 23a collides at a speed v at the contact portion 36aa. At this time, if the mass of the upper structure 11, the damper system 100a, the lower structure 12a, etc., which are moving objects, is m, the shaft 23a and the abutting portion 36aa collide with a momentum mv. Since the shaft 23a instantaneously collides with the contact portion 36aa, a force is applied to the shaft 23a during a certain instantaneous time Δt. At this time, the force fa applied to the shaft 23a is a value obtained by dividing the momentum mv by the time Δt, and is larger than the statically applied force Fy described above. At this time, the force applied to the damper system 100a acts only for a short time Δt, so that the axial force member 29 as a component acts on each component of the damper system 100a soon after plastic deformation and absorption of energy. become. As a result, for example, the shaft 23a may be broken or the mounting plates 31aa and 31ab may be damaged.

  FIG. 7 is a schematic diagram showing changes in the force applied to the shaft 23a in the damper system 100 of FIG. In the following description, the case where the shaft 23a contacts the contact portion 36aa in the structure on the mounting plate 31aa side will be described, but the same applies to the case where the shaft 23a contacts the contact portions 36ab, 36ba, and 36bb. . The horizontal axis of FIG. 7 represents the relative displacement amount of the upper structure 11 with respect to the lower structure 12a, and the vertical axis of FIG. 7 represents the load applied to the shaft 23a. A solid line represents a change in force applied to the shaft 23a when the shaft 23a and the contact portion 36aa are in static contact. The dotted line schematically represents the force applied to the shaft 23a when the shaft 23a and the contact portion 36aa contact each other with a relative speed.

  In the damper system 100, when the shaft 23a moves by the distance d, the shaft 23a contacts the elastic member 40aa and deforms the elastic member 40aa. The one-dot chain line in FIG. 7 is the relationship between the deformation amount of the elastic member 40aa and the load. Also, the thin solid line in FIG. 7 represents the relationship between the amount of deformation due to elastic deformation of the damper 20 and the load, and corresponds to that indicated by the solid line in FIG. When the shaft 23a comes into contact with the elastic member 40aa, a change in force applied to the shaft 23a is represented by a thick solid line portion P in FIG. The portion P is, for example, a straight line whose slope is the combined spring constant when a spring having an elastic coefficient corresponding to the damper system 100 and a spring having an elastic coefficient of the elastic member 40aa are connected in series. That is, the inclination of the portion P is gentler than that when a force is applied only to the damper 20 or only to the elastic member 40aa.

  When the shaft 23a is deformed by a distance b after contacting the elastic member 40aa, the shaft 23a contacts the contact portion 36aa. When the shaft 23a comes into contact with the contact portion 36aa, a load is directly applied to the shaft 23a. Therefore, the inclination of the straight line indicated by the thick solid line portion Q in FIG. It is the same as the slope of the straight line representing the load relationship. That is, the inclination of the portion Q is the same as the inclination of the thin solid line in FIG.

  When a static load is applied to the damper system 100, the load applied to the shaft 23a changes as shown by the thick solid line in FIG. However, when vibration is applied to the upper structure 11 and the lower structure 12 a due to an earthquake or the like, the shaft 23 a moves with a relative speed with respect to the contact portion 36. In the damper system 100a of the comparative example, an impact force is applied to the shaft 23a. However, in the damper system 100 of the first embodiment, the relative moving distance due to the vibration of the upper structure 11 and the lower structure 12a exceeds the moving distance a. Even so, the impact force when the shaft 23a abuts against the abutting portion 36aa can be suppressed. This is because the elastic member 40aa is deformed by abutting against the elastic member 40aa before the shaft 23a abuts on the abutting portion 36aa, and the relative speed v of the shaft 23a with respect to the abutting portion 36aa is suppressed by the elastic force of the elastic member 40aa. It is because it can do. Thereby, the momentum mv which the axis | shaft 23a has is suppressed. Furthermore, the time Δt during which the shaft 23a and the contact portion 36aa are in contact with each other and force is applied to the shaft 23a is also increased. Therefore, in the damper system 100, the force f applied to the shaft 23a is a value obtained by dividing the momentum mv by the time Δt, and is smaller than the force fa applied to the damper system 100a described above. In other words, for example, it is possible to suppress the occurrence of problems such as breakage of the shaft 23a and breakage of the mounting plates 31aa and 31ab.

  For example, in the first embodiment, the elastic members 40aa, 40ab, 40ba, and 40bb can be set as follows. In FIG. 7, when the distance d is 50 mm, the elastic coefficients of the elastic members 40aa, 40ab, 40ba, 40bb are set to 4.5 kN / mm and the distance b is set to 11 mm, the axial load of the damper 20 is 50 kN and the shaft 23a The contact portions 36aa and 36ba or the contact portions 36ab and 36bb contact each other. In FIG. 7, when the distance d is 50 mm, the elastic coefficients of the elastic members 40aa, 40ab, 40ba, and 40bb are set to 4.5 kN / mm and the distance b is set to 7.5 mm, the axial load of the damper 20 is 80 kN. Thus, the shaft 23a contacts the contact portions 36aa, 36ba or the contact portions 36ab, 36bb. The yield axial force of the damper 20 is set to 207 kN, Fy in FIG. 7 is 207 kN, and when the axial load applied to the damper 20 is 207 kN, the relative displacement amount of the upper structure 11 with respect to the lower structure 12a increases. However, the load applied to the damper 20 does not change. When the damper 20 yields, the energy of the relative displacement between the upper structure 11 and the lower structure 12a can be absorbed.

(Effect of Embodiment 1)
The damper system 100 according to the first embodiment includes an upper structure 11 and a lower structure 12a constituting a bridge (corresponding to a “structure” in the present invention) (in the present invention, “two relatively displaceable differences”). A damper system 100 provided between the upper structure 11 and the lower structure 12a, and a damper 20 for absorbing energy due to relative displacement between the upper structure 11 and the lower structure 12a, and the upper structure 11 and the lower structure 12a, respectively. Mounting portions 30a and 30b that support the end portions of the damper 20, elastic members 40aa, 40ab, 40ba, and 40bb that generate reaction force against relative displacement between the damper 20 and the mounting portion 30a, and the end portion 21a. Alternatively, the slits 32a and 32b provided on one of the attachment portions 30a and the end 21a that fits into the slits 32a and 32b. Comprises a shaft 23a provided on the other of the mounting portion 30b. The slit 32 includes contact portions 36aa, 36ab, 36ba, and 36bb that contact when the shaft 23a is displaced along the slits 32a and 32b. The elastic members 40aa, 40ab, 40ba, and 40bb are disposed between the shaft 23a and the contact portions 36aa, 36ab, 36ba, and 36bb.
With this configuration, when vibration is applied to a structure such as a bridge due to a large-scale earthquake or the like, the elastic members 40aa, 40ab, 40ba, and 40bb act as a buffer member, and shock force is applied to the damper system 100. Can be suppressed. In addition, since there is a gap between the shaft 23a and the contact portions 36aa, 36ab, 36ba, 36bb, the dimensional change due to the temperature of the environment where the structure is installed, A force applied to the damper system 100 is not applied by vibrations caused by a small-scale earthquake within the design range of the structure, and the damper 20 is prevented from operating. Therefore, the damper system 100 does not cause the fatigue damage of the damper 20 or deformation due to excessive load applied to the structure due to long-term use.

Further, according to the damper system 100 according to the first embodiment, the shaft 23a contacts the elastic members 40aa and 40ba or the elastic members 40ab and 40bb when the end 21a is displaced relative to the mounting portion 30a. The elastic member 40aa, 40ba or the elastic member 40ab, 40bb is deformed, and the shaft 23a and the abutting portions 36aa, 36ba, 36ab, 36bb are in contact with each other within a deformation amount range in which the elastic member 40aa, 40ab, 40ba, 40bb can be elastically deformed. Touch.
By being configured in this way, even when a vibration is applied to a structure such as a bridge due to a large-scale earthquake or the like, the elastic members 40aa, 40ab, 40ba, and 40bb continue to act as buffer members without being damaged. be able to. For example, when the distance L between the upper structure 11 and the lower structure 12a repeatedly approaches and separates due to vibration such as a large-scale earthquake, the shaft 23a repeatedly comes into contact with the elastic member 40, but the elastic member 40aa , 40ab, 40ba, 40bb, the shaft 23a comes into contact with the contact portions 36aa, 36ba, 36ab, 36bb of the slits 32a, 32b within the range of deformation that can be elastically deformed. As a result, the elastic members 40aa, 40ab, 40ba, 40bb can continue to act as a buffer member without being plastically deformed or damaged.

Further, according to the damper system 100 according to the first embodiment, the elastic members 40aa, 40ab, 40ba, 40bb are provided on the outer surfaces 35aa, 35ab of the mounting plates 31aa, 31ab. In the present invention, the outer surfaces 35aa and 35ab of the mounting plates 31aa and 31ab correspond to the surfaces where the slits 32a and 32b are opened.
By being configured in this manner, the elastic member 40 is easy to detect even if it is damaged or deteriorated when it is installed in a structure for a long time, and the replacement work of the elastic members 40aa, 40ab, 40ba, 40bb Will also be easier.

In addition, according to the damper system 100 according to the first embodiment, the attachment portion 30a is erected from the surface to which the attachment portion 30b of the upper structure 11 is attached, for example, toward the surface to which the attachment portion 30a of the lower structure 12a is attached. A pair of parallel mounting plates 31aa and 31ab are provided. The end 21a is inserted between the pair of mounting plates 31aa and 31ab. In the present invention, the upper structure 11 and the lower structure 12a correspond to one structural member and the other structural member.
Further, according to the damper system 100 according to the first embodiment, the slits 32a and 32b are formed in the mounting plates 31aa and 31ab. The shaft 23 a is formed at the end 21 a of the damper 20.
Furthermore, according to the damper system 100 according to the first embodiment, the shaft 23a includes the through portions 26a and 26b positioned inside the slits 32a and 32b, and the protruding portion 24a protruding outward from the mounting plates 31aa and 31ab. 24b. The elastic members 40aa and 40ab are attached to the outer surface 35aa of the mounting plate 31aa, and the elastic members 40ba and 40bb are attached to the outer surface 35ab of the mounting plate 31ab so that the end 21a is displaced relative to the mounting portion 30a. To contact the protrusions 24a and 24b. In the present invention, the “outer surface 35” corresponds to “the outer surface of the mounting plate”.
With this configuration, the damper system 100 has a simple structure, can be easily manufactured and installed, and can reduce costs.

Further, according to the damper system 100 according to the first embodiment, the elastic member 40 is arranged so as to generate a reaction force in the longitudinal direction of the slit 32.
With this configuration, when the shaft 23a moves inside the slit 32 and the shaft 23a contacts the elastic member 40, a large reaction force can be applied from the elastic member 40 to the shaft 23a. As a result, even when vibration such as a large-scale earthquake is applied to the structure, the speed v of movement of the shaft 23a can be reduced, so that the reliability of the damper system 100 can be improved.

According to the damper system 100 according to the first embodiment, the elastic members 40aa, 40ab, 40ba, and 40bb are configured by leaf springs.
With this configuration, even when vibration such as a large-scale earthquake is applied to the structure, the collision between the shaft 23a and the contact portion 36 can be reduced with a simple structure.

According to the damper system 100 according to the first embodiment, the damper 20 is a buckling-restrained damper.
With this configuration, when vibration such as a large-scale earthquake is applied to the structure, energy due to the vibration can be absorbed, and the earthquake resistance of the structure can be improved.

According to the damper system 100 according to the first embodiment, the distance from the shaft 23a to the contact portions 36aa, 36ba, 36ab, 36bb is set to be larger than the amount of expansion / contraction due to the environmental temperature of the structure.
With this configuration, an appropriate gap is formed between the shaft 23 and the abutting portions 36aa, 36ba, 36ab, and 36bb. The damper 20 does not operate because no force is applied to the damper system 100 due to dimensional changes due to the temperature of the environment in which the environment is located, or vibrations caused by small and medium-scale earthquakes within the design range of the structure. Therefore, the damper system 100 does not cause the fatigue damage of the damper 20 or deformation due to excessive load applied to the structure due to long-term use.

[Embodiment 2]
The damper system 200 according to the second embodiment of the present invention is obtained by changing the structure around the end portion 21a of the damper 20 with respect to the damper system 100 according to the first embodiment. The damper system 200 according to the second embodiment will be described with a focus on changes from the first embodiment. As for each part of the damper system 200 according to the second embodiment, components having the same functions and structures in the drawings are denoted by the same reference numerals as those used in the description of the first embodiment.

  FIG. 8 is an enlarged view of the damper system 200 according to the second embodiment. FIG. 8 is an enlarged view of the periphery of the attachment portion 30a in FIG. Unlike the damper system 100 according to the first embodiment, in the damper system 200, the elastic members 240a and 240b and the slits 232a and 232b are provided in the damper 220, and the shaft 223a is fixed to the mounting portion 230a.

  The end portion 221a of the damper 220 on the lower structure 12a side is erected on the end substrate 226a with two plate-like flat plate portions 225aa and 225ab facing each other in parallel. The flat plate portions 225aa and 225ab have the same shape. The flat plate portion 225aa has a slit 232a, and the flat plate portion 225ab has a slit 232b. The longitudinal directions of the slit 232a and the slit 232b are preferably formed in parallel with the longitudinal direction of the damper 220. The longitudinal direction of the slits 232a and 232b is not necessarily parallel to the longitudinal direction of the damper 220. When the upper structure 11 and the lower structure 12a are relatively displaced, the end portion 221a has a margin for moving, and the relative displacement between the upper structure 11 and the lower structure 12a reaches a predetermined amount. It is sufficient that a load is applied to the damper 220 sometimes.

  At both ends in the longitudinal direction of the slit 232a, contact portions 236aa and 236ab are formed. At both ends in the longitudinal direction of the slit 232b, contact portions 236ba and 236bb are formed. In the slit 232a provided in the flat plate portion 225aa, the contact portion 236aa is located on the lower structure 12a side, and the contact portion 236ab is located on the upper structure 11 side, that is, the side where the damper 220 is located. Similarly, in the slit 232b provided in the flat plate portion 225ab, the contact portion 236ba is located on the lower structure 12a side, and the contact portion 236bb is located on the upper structure 11 side, that is, the side where the damper 220 is located.

  A predetermined interval is provided between the flat plate portions 225aa and 225ab, and the elastic members 240a and 240b are disposed therebetween. In the second embodiment, the elastic members 240a and 240b are formed by stacking a plurality of bent leaf springs, and the end portion closer to the shaft 223a has a shaft 223a rather than the contact portions 236aa, 236ab, 236ba, and 236bb. It is arranged to come close to. The elastic members 240a and 240b are configured to apply a reaction force to the movement of the shaft 223a. The elastic members 240a and 240b are not limited to those obtained by stacking a plurality of leaf springs shown in FIG. For example, it may be configured by a single leaf spring like the elastic member 40 of the first embodiment.

  Elastic member support portions 227a and 227b are installed at the ends of the elastic members 240a and 240b opposite to the shaft 223a. In the second embodiment, the elastic member support portions 227a and 227b are flat plates provided so as to connect the flat plate portion 225aa and the flat plate portion 225ab, but the shaft 223a abuts on the elastic members 240a and 240b. Other shapes may be used as long as the generated force can be supported.

  In the second embodiment, two flat plate portions 225aa and 225ab are provided on the end portion 221a of the damper 220, and the elastic members 240a and 240b are disposed therebetween. However, other configurations may be adopted. . For example, the end 221a may be constituted by a single flat plate portion 225, the flat plate portion 225 may be provided with a slit 232, the shaft 223a may be passed through the slit 232, and the elastic member 240 may be attached to the surface where the slit 232 is open. . In other words, the slit 232 and the elastic member 240 are provided at the end 221a of the damper 220, and the shaft 223a fixed to the mounting portion 230 side moves in the slit 232, so that the shaft 223a and the elastic member 240 Any other structure may be adopted as long as it is configured so as to generate a reaction force when it comes into contact.

(Effect of Embodiment 2)
According to the damper system 200 according to the second embodiment, the slits 232a and 232b are formed at the end 221a of the damper 220. The shaft 223a is provided between the opposed inner surfaces of the pair of mounting plates 231aa and 231ab, and passes through slits 232a and 232b formed in the end 221a of the damper 220.
Further, according to the damper system 200 according to the second embodiment, the end portion 221a of the damper 220 includes the flat plate portions 225aa and 225ab that are disposed substantially parallel to the mounting plate 231. The elastic member 240 is attached to the surface where the slits 232a and 232b of the flat plate portion 225aa are opened.
Furthermore, according to the damper system 200 according to Embodiment 2, the end portion 221 of the damper 220 includes a pair of flat plate portions 225 arranged in parallel. Each of the pair of flat plate portions 225 has a slit 232. The elastic member 240 is disposed between the pair of flat plate portions 225.
By being configured in this way, the mounting portion 230 has a simple configuration, and the damper system 200 according to the second embodiment is replaced with a structure by replacing only the damper of the damper system that is already attached to the structure. Can be introduced. In addition, when the damper system 200 is installed over a long period of time, the elastic member 240 can also be replaced by replacing only the damper 220. Furthermore, since the damper 220 can be replaced with a new one without removing the mounting portion 230a fixed to the upper structure 11 and the lower structure 12a by an anchor or the like, the replacement work is easy, and the structure is damaged. Never give.

[Embodiment 3]
The damper system 300 according to the third embodiment of the present invention is obtained by changing the structure around the end 21a of the damper 20 with respect to the damper system 100 according to the first embodiment. The damper system 300 according to the third embodiment will be described focusing on the changes made to the first embodiment. As for each part of the damper system 300 according to the third embodiment, components having the same functions and structures in the drawings are denoted by the same reference numerals as those used in the description of the first embodiment.

  FIG. 9 is an enlarged view of the damper system 300 according to the third embodiment. FIG. 9 is an enlarged view of the periphery of the attachment portion 30a in FIG. Similar to the damper system 100 according to the first embodiment, the damper system 300 includes elastic members 340 a and 340 b and slits 332 a and 332 b provided on the mounting portion 330 a and a shaft 323 a fixed to the end 321 a of the damper 320.

  The end portion 321a on the lower structure 12a side of the damper 320 is erected on the end substrate 326a with two plate-like flat plate portions 325aa and 325ab facing each other in parallel. The flat plate portions 325aa and 325ab are formed in the same shape. A shaft 323a is fixed between the flat plate portion 325aa and the flat plate portion 325ab.

  The attachment portion 330a includes a substrate 337a fixed to the lower structure side attachment surface 18 of the lower structure 12a. A mounting plate 331aa and a mounting plate 331ab are erected from the substrate 337a. The mounting plate 331aa and the mounting plate 331ab are assembled so as to be positioned between the flat plate portion 325aa and the flat plate portion 325ab provided at the end 321a of the damper 320. The mounting plate 331aa and the mounting plate 331ab are formed to have the same shape.

  The mounting plate 331aa has a slit 332a, and the mounting plate 331ab has a slit 332b. The longitudinal directions of the slit 332a and the slit 332b are desirably formed in parallel with the longitudinal direction of the damper 320. Note that the longitudinal direction of the slits 332 a and 332 b is not necessarily parallel to the longitudinal direction of the damper 320. When the upper structure 11 and the lower structure 12a are relatively displaced, the end portion 321a has a margin to move, and the relative displacement between the upper structure 11 and the lower structure 12a reaches a predetermined amount. It is sufficient that a load is applied to the damper 320 sometimes.

  At both ends in the longitudinal direction of the slit 332a, contact portions 336aa and 336ab are formed. At both ends in the longitudinal direction of the slit 332b, contact portions 336ba and 336bb are formed. In the slit 332a provided in the mounting plate 331aa, the contact part 336aa is located on the lower structure 12a side, and the contact part 336ab is located on the upper structure 11 side, that is, the side where the damper 320 is located. Similarly, in the slit 332b provided in the mounting plate 331ab, the contact portion 336ba is located on the lower structure 12a side, and the contact portion 336bb is located on the upper structure 11 side, that is, the side where the damper 320 is located.

  A predetermined gap is provided between the mounting plates 331aa and 331ab, and elastic members 340a and 340b are disposed therebetween. In the second embodiment, the elastic members 340a and 340b are obtained by stacking a plurality of flat plate springs, and the end portion closer to the shaft 323a is shaft than the contact portions 336aa, 336ab, 336ba, and 336bb. It arrange | positions so that it may come to the position near 323a. The elastic members 340a and 340b are configured to apply a reaction force to the movement of the shaft 323a. The elastic members 340a and 340b are not limited to those in which a plurality of leaf springs illustrated in FIG. 8 are stacked. For example, it may be configured by a single leaf spring like the elastic member 340 of the first embodiment.

(Effect of Embodiment 3)
According to the damper system 300 according to the third embodiment, the end portion 321a of the damper 320 includes a pair of parallel flat plate portions 325aa and 325ab, and the attachment portion 330a attaches the attachment portion 330a of the lower structure 12a. A pair of mounting plates 331aa and 331ab parallel to each other are provided standing from the surface toward the surface to which the mounting portion 330b of the upper structure 11 is mounted. The pair of mounting plates 331aa and 331ab are inserted between the pair of flat plate portions 325aa and 325ab.
Further, according to the damper system 300 according to the third embodiment, the slit 332a is formed in the mounting plate 331ab, and the shaft 323a is fixed between the pair of flat plate portions 325aa and 325ab.
With this configuration, it is possible to obtain the damper system 300 that can be easily attached to the structure while obtaining the same effects as those of the damper system 100 of the first embodiment.

  According to the present invention, while absorbing energy due to vibration applied to the structure, it does not operate normally in vibration within the design range of the structure, and operates when large vibration such as a large-scale earthquake is applied, And the impact force can be reduced. Therefore, it can be widely used as a vibration-damping and earthquake-resistant member for civil engineering structures and building structures without being limited to the lower part of the bridge.

  11 Upper structure, 12 Lower structure, 12a Lower structure, 13 Movable support, 14 Fixed support, 16 Mounting member, 17 Upper structure side mounting surface, 18 Lower structure side mounting surface, 20 Damper, 20a Damper, 21 End, 21a End Part, 21b end part, 22 through hole, 22a through hole, 22b through hole, 23 axis, 23a axis, 23b axis, 24 protruding part, 24a protruding part, 25 stiffening tube, 26a through part, 26b through part, 29 axis Force material, 30 mounting portion, 30a mounting portion, 30b mounting portion, 31 mounting plate, 31aa mounting plate, 31ab mounting plate, 31ba mounting plate, 31bb mounting plate, 32 slit, 32a slit, 32b slit, 34aa inside surface, 34ab inside Side, 34ba inner side, 34bb inner side, 35 outer side, 35aa outer side, 35ab outer side 36 contact part, 36a contact part, 36aa contact part, 36ab contact part, 36ba contact part, 36bb contact part, 37a substrate, 37b substrate, 38 shaft support hole, 38a shaft support hole, 38b shaft support hole 40 elastic member, 40a elastic member, 40aa elastic member, 40ab elastic member, 40b elastic member, 100 damper system, 100a damper system, 200 damper system, 220 damper, 221 end, 221a end, 223 axis, 223a axis, 225 flat plate portion, 225aa flat plate portion, 225ab flat plate portion, 226a end substrate, 227 elastic member support portion, 227a elastic member support portion, 227b elastic member support portion, 230 attachment portion, 230a attachment portion, 231 attachment plate, 231aa attachment plate 231ab mounting plate, 232 slit, 2 2a slit, 232b slit, 236 contact part, 236aa contact part, 236ab contact part, 236ba contact part, 236bb contact part, 240 elastic member, 240a elastic member, 240b elastic member, F force, Fy force, L Distance, P (represented by thick solid line in FIG. 7), Q (represented by thick solid line in FIG. 7), a moving distance, b distance, d distance, f force, fa force, mv momentum , V speed, δ deformation amount, δy deformation amount.

Claims (15)

A damper system provided between two relatively displaceable different structural members constituting a structure,
A damper that absorbs energy due to the relative displacement of the two structural members;
An attachment portion attached to each of the two structural members, and supporting an end portion of the damper;
An elastic member that generates a reaction force against relative displacement between the damper and the mounting portion;
A slit provided on one of the end part or the attachment part;
A shaft that is provided on the other of the end portion or the attachment portion and fits with the slit;
The slit is
A contact portion that contacts when the shaft is displaced along the slit;
The elastic member is
A damper system disposed between the shaft and the contact portion. The axis is
When the end portion is displaced relative to the mounting portion, the elastic member is deformed by contacting the elastic member, and the shaft and the abutting portion are within a deformation amount range in which the elastic member can be elastically deformed. The damper system according to claim 1, wherein The elastic member is
The damper system of Claim 1 or 2 provided in the surface where the said slit is opening. The mounting portion is
A pair of mounting plates parallel to each other provided upright from a surface to which the mounting portion of one of the structural members is mounted toward a surface to which the mounting portion of the other structural member is mounted;
The end is
The damper system according to any one of claims 1 to 3, wherein the damper system is inserted between the pair of mounting plates. The slit is
Formed on the mounting plate,
The axis is
The damper system according to claim 4, wherein the damper system is formed at the end of the damper. The axis is
A penetrating part located inside the slit;
A projecting portion projecting outward from the mounting plate,
The elastic member is
The damper system according to claim 5, wherein the damper system is attached to an outer surface of the attachment plate, and the end portion comes into contact with the protruding portion by being displaced relative to the attachment portion. The slit is
Formed at the end of the damper,
The axis is
The damper system according to claim 4, wherein the damper system is provided between inner surfaces facing each other of the pair of mounting plates and penetrates the slit formed in the end portion of the damper. The end of the damper is
A flat plate portion disposed substantially parallel to the mounting plate;
The damper system according to claim 7, wherein the elastic member is attached to a surface of the flat plate portion where the slit is open. The end of the damper is
Comprising a pair of substantially parallel flat plate portions,
A pair of the mounting plates of the mounting part,
Each having the slit,
The elastic member is
The damper system of Claim 7 arrange | positioned between a pair of said flat plate part. The end of the damper is
Comprising a pair of parallel plate portions,
The mounting portion is
A pair of mounting plates parallel to each other provided upright from a surface to which the mounting portion of one of the structural members is mounted toward a surface to which the mounting portion of the other structural member is mounted;
The pair of mounting plates is
The damper system according to any one of claims 1 to 3, wherein the damper system is inserted between the pair of flat plate portions. The slit is
Formed on the mounting plate,
The axis is
The damper system according to claim 10, wherein the damper system is fixed between the pair of flat plate portions. The elastic member is
The damper system according to any one of claims 1 to 11, wherein the damper system is arranged so as to generate a reaction force in a longitudinal direction of the slit. The elastic member is
The damper system according to any one of claims 1 to 12, comprising a leaf spring. The damper is
The damper system according to any one of claims 1 to 13, which is a buckling-restrained damper. The distance from the shaft to the contact portion is
The displacement is set larger than the displacement of two relatively displaced different structural members due to the environmental temperature of the structure and the displacement of two relatively displaced different structural members due to a small-scale earthquake. The damper system according to any one of 14.

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