JP2014013049A - Vibration control structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably produce friction force by suppressing inclination of a splice plate which occurs when the friction force of an upper friction damper is greater than the friction force of a lower friction damper.SOLUTION: A vibration control structure has friction damper units for suppressing relative movement. The friction damper units include: a first pressure contact plate 11 provided on one of a pair of members; a second pressure contact plate 12 provided on the other; and a third pressure contact plate 21 put in pressure contact with the first pressure contact plate and the second pressure contact plate, the first pressure contact plate 11 having a first through-hole long in a predetermined direction and being slidable a first moving distance, the second pressure contact plate 12 having a through-hole longer in the predetermined direction than the first through-hole and being slidable a second moving distance, and the third pressure contact plate 21 having a third through-hole and a fourth through-hole and further including an inclination restricting member 11d for restricting the inclination of the third pressure contact plate 21.

Description

  The present invention relates to a damping structure for two members that move relative to each other.

  For example, a friction damper is known as a damping structure that attenuates vibration at a joint between two members that can move relative to each other. This friction damper is provided, for example, in a stud provided between floors that move relative to each other in the horizontal direction in a building frame, and the relative movement is suppressed by the frictional force between the pressure plates that slide with the aforementioned relative movement. (For example, refer to Patent Document 1).

JP 2012-67806 A

  In the friction damper shown in Patent Document 1, the friction force by the upper friction damper is higher than the friction force by the lower friction damper. Therefore, the sliding with the lower friction damper is performed first, and after the sliding with the lower friction damper is completed, the sliding with the upper friction damper is started. However, there is a possibility that the splice plate may be inclined at the timing of switching from sliding in the lower friction damper to sliding in the upper friction damper. The occurrence of such an inclination causes problems such as delaying the generation of frictional force. Therefore, it is desirable to suppress the inclination of the member and stably generate the frictional force.

  This invention is made | formed in view of such a situation, and it aims at producing a frictional force stably.

  In order to achieve such an object, the vibration control structure according to the present invention is arranged between a pair of members that move relative to each other in a predetermined direction in a building frame, and friction between pressure plates that slide with the relative movement. A vibration damping structure having a friction damper unit that suppresses the relative movement by force, wherein the friction damper unit includes a first pressure contact plate provided on one member of the pair of members, and the pair of members A second pressure contact plate provided on the other member, a third pressure contact plate pressed against the first pressure contact plate and the second pressure contact plate, and a pressure contact force against the first pressure contact plate and the third pressure contact plate. The first pressure contact force biasing member joined by the first pressure contact force biasing member, and the second pressure contact plate and the third pressure contact plate joined by the second pressure contact force biasing member that biases the pressure contact force. A second joining portion, wherein the first pressure contact plate is The first through hole that is long in the direction is slidable in the first movement amount, and the second pressure contact plate is provided with a second through hole that is longer in the predetermined direction than the first through hole and is in the second movement amount. The third pressure contact plate includes a third through hole and a fourth through hole, the first bolt member provided through the first through hole and the third through hole, And a second bolt member that is provided through the second through hole and the fourth through hole, and includes a tilt regulating member that regulates the tilt of the third press contact plate. It is.

  When the third pressure contact plate moves in the relative movement direction and the first bolt member comes into contact with and engages with the first through hole, there is a risk of causing an inclination such that the third pressure contact plate rotates about the first bolt member. However, according to such a vibration control structure, since the third pressure contact plate abuts against the inclination regulating member, it is possible to suppress the occurrence of the inclination. Then, the transition from the generation of the frictional force at the first joint portion to the generation of the frictional force at the second joint portion can be stably performed. That is, a frictional force can be generated stably.

In this vibration damping structure, the friction force generated between the second pressure contact plate and the third pressure contact plate is higher than the friction force generated between the first pressure contact plate and the third pressure contact plate. Is desirable.
According to such a vibration damping structure, the frictional force generated between the first pressure contact plate and the third pressure contact plate in the first joint portion and the space between the second pressure contact plate and the third pressure contact plate in the second joint portion. Therefore, the frictional force can be changed stepwise so that the frictional force increases as the load increases.

In this vibration damping structure, it is desirable that the urging force at the second joint is higher than the urging force at the first joint.
Even with such a vibration damping structure, the frictional force generated between the first pressure contact plate and the third pressure contact plate in the first joint portion and the second pressure contact plate and the third pressure contact plate in the second joint portion are between. Since the generated friction force can be varied, the friction force can be changed stepwise so that the friction force increases as the load increases.

In this vibration damping structure, the first press contact plate and the second press contact plate are opposed to each other with an interval between the first press contact plate and the second press contact plate, and the third press contact plate includes the first press contact plate and the first press contact plate. It is desirable that it is stretched between two pressure plates.
According to such a vibration damping structure, the third press contact plate is spanned between the first press contact plate and the second press contact plate whose ends are opposed to each other with an interval therebetween. A portion where the first pressure contact plate and the third pressure contact plate relatively move to generate a frictional force and a portion where the second pressure contact plate and the third pressure contact plate relatively move to generate a frictional force are on the same plane. Can be arranged. For this reason, when the frictional force is applied, the first pressure contact plate, the second pressure contact plate, and the third pressure contact plate are unlikely to be twisted, so that vibration can be more efficiently suppressed.

In this vibration damping structure, the first bolt member is provided to be inserted through the pipe member, and the force with which the second pressure contact plate and the third pressure contact plate move relative to each other is transmitted through the pipe member. It is desirable to be transmitted to the second joint.
According to such a vibration control structure, the force of the relative movement between the second pressure contact plate and the third pressure contact plate is transmitted from the first pressure contact plate to the third pressure contact plate via the pipe member. While protecting a bolt member with a pipe member, the 1st bolt member can be used specialized only in provision of press-contact force, and the soundness can be maintained highly.

In this vibration damping structure, when the pipe member engages with the first through hole at the first joint portion, the force of relative movement between the second pressure contact plate and the third pressure contact plate is It is desirable to be transmitted to the third press contact plate.
According to such a vibration control structure, the force of relative movement between the second pressure contact plate and the third pressure contact plate is transmitted to the second pressure contact plate via the engagement between the pipe member and the first through hole. The shearing force is hardly applied to the bolt, and the first bolt member can be used exclusively for the application of the pressing force, and the soundness can be maintained higher.

In this vibration damping structure, a sliding plate provided on one of the first pressure-contact plate and the third pressure-contact plate and one of the second pressure-contact plate and the third pressure-contact plate; , Provided on the other of the first pressure contact plate and the third pressure contact plate and on the other of the second pressure contact plate and the third pressure contact plate, the first pressure contact plate and the third pressure contact plate. It is desirable to have a plate and a friction plate that slides with the sliding plate and generates the frictional force when the second pressure contact plate and the third pressure contact plate move relative to each other.
According to such a vibration control structure, the sliding plate provided on one of the first pressure-contact plate and the third pressure-contact plate, and one of the second pressure-contact plate and the third pressure-contact plate, A first pressure contact plate, a third pressure contact plate, and a second pressure contact plate provided on the other one of the first pressure contact plate and the third pressure contact plate and the other of the second pressure contact plate and the third pressure contact plate. And a friction plate that generates frictional force by sliding with the sliding plate when the third pressure contact plate relatively moves, so that the first joint and the second joint are stable when they are relatively moved. It is possible to control the vibration by generating the generated frictional force.

In this vibration damping structure, the first pressure contact force biasing member and the second pressure contact force biasing member are disc springs, the pressure contact force biased at the first joint, and the second It is desirable that the pressure contact force biased at the joint is adjusted by the disc spring.
According to such a vibration control structure, the first pressure contact force biasing member and the second pressure contact force biasing member are disc springs having a non-linear spring region in which the load variation is small with respect to the deformation amount in the pressure direction. A stable pressure contact force can be generated. In particular, in the vibration damping structure of this joint, a disc spring that provides a stable urging force is used in order to change the urging force urged by the first urging force urging member and the second urging force urging member. ing. Further, since a plurality of disc springs can be used, the pressure contact force can be easily adjusted by changing the number of disc springs to be stacked.

In this vibration damping structure, it is preferable that the third pressure contact plate is provided on both sides of the first pressure contact plate and the second pressure contact plate.
According to such a vibration damping structure, the third pressure contact plate is stable with respect to the first pressure contact plate and the second pressure contact plate by sandwiching the first pressure contact plate and the second pressure contact plate from both sides with the third pressure contact plate. It is possible to generate a stable frictional force by relative movement in the above state.

  As described above, when the third pressure contact plate moves in the relative movement direction and the first bolt member abuts and engages with the first through hole, the inclination is such that the third pressure contact plate rotates about the first bolt member. However, since the third pressure contact plate comes into contact with the inclination regulating member, the occurrence of the inclination can be suppressed. Then, the transition from the generation of the frictional force at the first joint portion to the generation of the frictional force at the second joint portion can be stably performed. That is, the frictional force can be generated stably.

It is a perspective view which shows an example of the state which incorporated the damping structure of the junction part which concerns on this embodiment in the pillar of a building. It is the schematic diagram which looked at the friction damper unit of this embodiment from the front. It is AA sectional drawing in FIG. It is BB sectional drawing in FIG. It is CC sectional drawing in FIG. It is a graph which shows the vibration energy absorption history characteristic of this friction damper unit. It is sectional drawing for demonstrating operation | movement of the lower friction damper by a wind load. It is sectional drawing for demonstrating operation | movement of the friction damper unit by an earthquake.

Hereinafter, an example of the vibration damping structure of the joint portion of the present embodiment will be described in detail with reference to the drawings.
FIG. 1 is a perspective view illustrating an example of a state in which the vibration damping structure for a joint according to the present embodiment is incorporated in a building pillar. FIG. 2 is a schematic view of the friction damper unit of this embodiment as viewed from the front. 3 is an AA cross-sectional view in FIG. 2, FIG. 4 is a BB cross-sectional view in FIG. 2, and FIG. 5 is a CC cross-sectional view in FIG.

  The vibration damping structure of the joint portion according to the present invention is a bolt joint portion in which columns, beams, braces, inter-columns, etc. provided between upper and lower layers such as a multi-storey building are joined with bolts in the horizontal direction. It has a friction damper that controls relative movement.

  In the present embodiment, as shown in FIG. 1, an example in which the friction dampers 20 and 30 are incorporated in the stud 10 will be described.

  The stud 10 is arranged between the upper hierarchy 3 and the lower hierarchy 5 in a bridging direction. Further, the inter-column 10 is divided at a substantially central position in the spanning direction, which is the longitudinal direction thereof, and is joined while forming the friction dampers 20 and 30 using the divided end portions.

  Specifically, as shown in FIG. 1 to FIG. 5, the intermediate pillar 10 is divided so as to be spaced apart in the vertical direction, and the intermediate pillar lower part 11 as the first member and the intermediate pillar upper part 12 as the third member are separated. There is no.

  The lower part 11 and the upper part 12 of the stud are opposed to each other with an upper end 11c of the lower part 11 and a lower part 12c of the upper part 12 spaced apart from each other in a vertical direction as a predetermined direction. Two splice plates 21 forming a pair as a second member spanned between the lower pillar portion 11 and the upper pillar portion 12 on the front and back surfaces of the lower pillar portion 11 and the upper pillar portion 12 are respectively in the relative movement direction. Three pairs are provided side by side. The joints between the three pairs of splice plates 21 and the lower part 11 and the upper part 12 constitute friction dampers 20 and 30, respectively. That is, the friction damper unit 25 in which the friction dampers 20 and 30 are constituted by two joint portions of the pair of splice plates 21 and the intermediate column lower portion 11 and the intermediate column upper portion 12 that are bridged between the intermediate column lower portion 11 and the intermediate column upper portion 12. There are 3 sets. Hereinafter, the friction damper formed at the joint between the upper part 12 and the splice plate 21 is referred to as the upper friction damper 20, and the friction damper formed at the joint between the lower part 11 and the splice plate 21 is used as the lower friction. The damper 30 will be described. Here, the lower friction damper 30 corresponds to the first joint portion, and the upper friction damper 20 corresponds to the second joint portion.

  Since the three sets of friction damper units 25 have the same configuration, only one friction damper unit 25 will be described here.

  The friction damper unit 25 includes a pair of splice plates 21 that face each other across the intermediate column lower portion 11 and the intermediate column upper portion 12 in a direction crossing the vertical direction, and span between the intermediate column lower portion 11 and the intermediate column upper portion 12. Has been. That is, on the upper friction damper 20 side, the two splice plates 21 and the inter-column upper part 12 interposed therebetween overlap.

  Further, a sliding plate 26 as a sliding plate is fixed on the inter-column upper portion 12 side and a friction plate 28 is fixed on the splice plate 21 side between the inter-column upper portion 12 and each splice plate 21. Here, an organic friction material or an inorganic friction material can be used for the friction plate 28. Organic friction materials include thermosetting resins as binders, fiber materials such as aramid fibers, glass fibers, vinylon fibers, and carbon fibers, friction modifiers such as cashew dust and lead, and fillers such as sulfate sulfate. It is formed of a composite friction material consisting of Examples of the thermosetting resin include phenol resin, melamine resin, furan resin, polyimide resin, DFK resin, guanamine resin, epoxy resin, xylene resin, silicone resin, diallyl phthalene resin, and unsaturated polyester resin. On the other hand, the sliding plate 26 is formed of a material having corrosion resistance such as stainless steel or titanium described above.

  Long holes 12a and 26a that are long in the relative movement direction are provided in the inter-column upper portion 12 and the sliding plate 26. The two splice plates 21 and the friction plate 28 are provided with circular round holes 21a and 28a. Here, the long hole 12a provided in the top portion 12 of the stud corresponds to the second through hole.

  High-strength bolts 16 are passed through the long holes 12a, 26a or the round holes 21a, 28a provided in the two splice plates 21, the upper part 12 of the studs 2, the pair of sliding plates 26 and the friction plate 28.

  The high-strength bolt 16 penetrates the disc spring laminated body 8 provided on the opposite side to the upper part 12 of the splice plate 21 of the pair of splice plates 21 and on which a plurality of disc springs are stacked, and a nut 18. Are screwed together. At this time, between the head 16a of the high-strength bolt 16 and the other splice plate 21, between the one splice plate 21 and the disc spring laminate 8, and between the disc spring laminate 8 and the nut 18, respectively. A washer 45 is interposed. A bush 46 is provided between the disc spring laminate 8 and the high-strength bolt 16 to enter the inner peripheral side of the disc spring laminate 8 and regulate the position of each disc spring.

  The disc spring laminated body 8 is a second pressurizing force bias that biases the pressurizing force between the two splice plates 21 by compressing the nut 18 by being screwed into the high strength bolt 16 and being compressed. It is a member. The two splice plates 21 and the inter-column upper part 12 are configured to be movable relative to each other in the horizontal direction while being urged by the press-contact force of the disc spring laminated body 8, and the two splice plates 21 and the inter-column upper part 12 are relatively moved. In some cases, the friction plate 28 and the sliding plate 26 are configured to slide to generate a frictional force.

  On the lower friction damper 30 side, the two splice plates 21 and the inter-column lower part 11 interposed therebetween overlap.

  In addition, a sliding plate 26 is fixed to the intermediate column lower portion 11 side and a friction plate 28 is fixed to the splice plate 21 side between the intermediate column lower portion 11 and each splice plate 21. The two splice plates 21, the lower part of the stud 11, the pair of sliding plates 26 and the friction plate 28 are provided with round holes 11b, 21b, 26b, 28b, and the round holes 11b, 21b, 26b, 28b A high-strength bolt 16 inserted in the pipe axis direction is passed through a steel round pipe 17 as a pipe material. Here, the round hole 11b provided in the stud 11 corresponds to the first through hole. The diameters of the round holes 21b and 28b of the two splice plates 21 and the friction plate 28 are set so that the clearance between the round pipe 17 and the penetrating round pipe 17 is substantially zero. The hole diameter of the sliding plate 26 is set such that a gap S is formed between the sliding plate 26 and the round pipe 17. The gap S is determined in consideration of the relative movement amount between the lower column 11 and the upper 12 that is assumed when a wind load is applied to the column beam frame. Is set to the same value as or slightly larger than this.

  Here, more preferably, a gap is provided between the high-strength bolt 16 and the round pipe 17, and more preferably, the size of the gap is deformed to a limit state (for example, an elastic limit) assumed in the design. The round pipe 17 may be sized so that the inner peripheral surface of the round pipe 17 and the high-strength bolt 16 do not contact each other. And if it sets in this way, since the external force for sliding the splice plate 21 which makes a pair will act only on the round pipe 17 and will not act on the high-strength bolt 16, the soundness of the high-strength bolt 16 Can be maintained in a high state.

  The high-strength bolt 16 penetrates the disc spring laminated body 8 provided on the opposite side of the intermediate column lower portion 11 of one splice plate 21 and overlaid with a plurality of disc springs, and a nut 18 is screwed together. At this time, between the head 16a of the high-strength bolt 16 and the other splice plate 21, between the one splice plate 21 and the disc spring laminate 8, and between the disc spring laminate 8 and the nut 18, respectively. A washer 45 is interposed. A bush 46 is provided between the disc spring laminate 8 and the high-strength bolt 16 to enter the inner peripheral side of the disc spring laminate 8 and regulate the position of each disc spring.

  The disc spring laminated body 8 is a first pressurizing force biasing member that compresses the nut 18 by being screwed into the high-strength bolt 16 and is tightened, and biases the pressurizing force between the two splice plates 21. is there. The two splice plates 21 and the intermediate column lower portion 11 are configured to be relatively movable in the horizontal direction while being urged by the press-contact force by the disc spring laminated body 8, and the two splice plates 21 and the intermediate column lower portion 11 are relatively moved. In some cases, the friction plate 28 and the sliding plate 26 are configured to slide to generate a frictional force. At this time, the pressure contact force by the biasing force of the disc spring laminated body 8 provided on the side pillar lower portion 11 side is set smaller than the pressure contact force by the biasing force of the disc spring laminated body 8 provided on the side pillar upper portion 12 side. That is, in this embodiment, even if the same friction plate 28 and the sliding plate 26 are used by making the pressure contact force due to the urging force of the disc spring laminate 8 different between the upper friction damper 20 and the lower friction damper 30, The frictional force generated at the first joint is smaller than the frictional force generated at the second joint.

  Specifically, in the upper friction damper 20, the upper portion of the stud 12 and the splice plate 21 move relative to each other due to the vibration that a large external force such as an earthquake acts on, and the lower friction damper 30 receives a small external force such as a wind load. Even if it is a vibration, it is set to move relatively. The difference between the pressure contact force of the upper friction damper 20 and the pressure contact force of the lower friction damper 30 is adjusted by, for example, changing the number of disk springs constituting the disk spring laminate 8 included in the upper friction damper 20 and the lower friction damper 30. ing. That is, the disc spring laminated body 8 of the upper friction damper 20 is configured by stacking more disc springs than the disc spring laminated body 8 of the lower friction damper 30.

  Further, an inclination regulating member 11d is provided on the lower part 11 of the stud. The inclination restricting member 11d is a protrusion-like member that protrudes from the lower part 11 of the stud to the splice plate 21 side. As shown in FIG. 2, when the central axis of the splice plate 21 is located at the center of the long hole 11b1, the inclination regulating member 11d extends from the end of the round pipe 17 to the end of the long hole 11b1 in the lower part 11 of the stud. Is provided symmetrically at a position spaced from the end of the splice plate 21 by a distance ΔX1.

  By doing so, when the splice plate 21 moves in the relative movement direction and the round pipe 17 comes into contact with and engages with the elongated hole 11b1, there is a risk that the splice plate 21 may be tilted around the round pipe 17 as an axis. However, since the side wall of the splice plate 21 is in contact with the end surface of the inclination regulating member 11d, the occurrence of the inclination can be suppressed.

  Here, the inclination regulating member 11d is disposed on the central axis extending in the longitudinal direction of the long hole 11b1, but may be at another position as long as it is separated from the side wall of the splice plate 21 by a distance ΔX1. At that time, it is desirable to provide a plurality of inclination regulating members 11. In FIG. 2, the inclination restricting member 11 d has a rectangular shape that is in contact with the splice plate 21 on the surface, but may be a cylindrical shape that is in contact with a point.

  In the building in which the friction damper unit 25 having the upper friction damper 20 and the lower friction damper 30 is provided in the inter-column 10, the input external force is small under the action of the wind load. And the relative movement amount between the lower part 11 of the stud is also reduced. Further, as described above, the gap S between the round pipe 17 and the round hole 11b of the inter-column lower part 11 is a relative movement between the two splice plates 21 and the inter-column lower part 11 assumed under the action of the wind load. It is set larger than the amount. Therefore, even if the column beam frame vibrates, the intermediate pillar lower part 11 only moves relative to the round pipe 17 within the range of the gap S, and the inner peripheral surface of the round hole 11b of the intermediate pillar lower part 11 becomes the round pipe 17. There is no contact engagement, and therefore no force in the relative movement direction acts from the inter-column lower part 11 to the round pipe 17. At this time, in the upper friction damper 20 that is set so as to move together due to vibrations caused by a large external force such as an earthquake, the inter-column upper part 12 and the splice plate 21 do not move relative to each other. As a result, only the lower part 11 of the studs slides with respect to the two splice plates 21, and a state in which the two splice plates 21 and the upper part 12 of the studs do not slide is created. That is, with respect to vibration caused by a small external force such as a wind load, a small friction force is generated in the lower friction damper 30, whereby the lower friction damper 30 responds to a vibration caused by a small external force caused by the wind load. It can be effectively damped by a small frictional force.

  On the other hand, since the external force is large in the event of an earthquake, the amount of relative movement between the two splice plates 21 and the lower part of the intermediate pillar 11 becomes larger than the gap S between the round pipe 17 and the round hole 11b. For this reason, along with the relative movement, the inner peripheral surface of the round hole 11 b in the lower part of the stud 11 comes into contact with and engages with the round pipe 17. Then, the external force due to this abutting engagement passes through the form of a shearing force in the round pipe 17 and then abuts and engages with the inner peripheral surfaces of the round holes 21b of the two splice plates 21 of the round pipe 17. 11 is transmitted to the splice plate 21, and the transmitted external force acts to move the two splice plates 21 relative to the upper part 12 of the stud. As a result, the two splice plates 21 slide relative to the upper part 12 of the stud. As a result, a large frictional force is generated in the upper friction damper 20 with respect to vibration with a large relative movement amount, that is, vibration with a large external force. As a result, the upper friction damper 20 has a large external force during an earthquake. Can be effectively damped by a large frictional force corresponding thereto.

  FIG. 6 is a graph showing the vibration energy absorption history characteristics of the friction damper unit. This graph is a graph obtained by forcibly oscillating with a predetermined amplitude δ1 or amplitude δ2 in the relative movement direction. The horizontal axis indicates the relative displacement amount δ in the relative movement direction, and the vertical axis indicates the upper friction. The frictional force generated by the damper 20 and the lower friction damper 30 is shown. The amplitude δ1 is an assumed amplitude amount at the time of an earthquake, and the amplitude δ2 is an assumed amplitude amount under the action of a wind load. FIG. 7 is a cross-sectional view for explaining the operation of the lower friction damper due to the wind load.

  In FIG. 6, square ABCD shows the vibration energy absorption history characteristic in a state where only the lower friction damper 30 slides and the upper friction damper 20 does not act as described above under the action of wind load. That is, the point E is the state shown in FIG. 7A, and shows a state where no external force is applied to the lower friction damper 30. Point A is the state shown in FIG. 7B, where the wind load is applied and the inter-column lower part 11 is moved relative to the two splice plates 21 in a predetermined direction so that the relative displacement amount δ reaches the maximum δ2. Is shown. Point B shows a state immediately after the direction of relative movement of the lower part 11 of the studs with respect to the two splice plates 21 is reversed. Point C is the state shown in FIG. 7C, and shows the state in which the relative displacement amount δ of the inter-column lower portion 11 with respect to the two splice plates 21 becomes −δ2 at the maximum after the relative movement direction is reversed. Point D shows a state immediately after the relative movement direction of the lower part 11 of the stud with respect to the two splice plates 21 is reversed again. Thereafter, the upper friction damper 20 returns to the state of point A. That is, such a cycle is repeated under wind load.

  On the other hand, since the upper friction damper 20 acts during an earthquake, the friction force generated by the upper friction damper 20 acts as a vibration damping force. The frictional force generated by the upper friction damper 20 is larger than that under the wind load action as indicated by the line segment MF and the line segment IJ in the polygon FGHIJKLM in FIG.

FIG. 8 is a cross-sectional view for explaining the operation of the friction damper unit due to an earthquake.
When vibration due to an earthquake acts on the friction damper unit 25, first, the lower friction damper 30 having a small pressure contact force causes the lower portion 11 of the stud and the two splice plates 21 to round the inner peripheral surface of the round hole 11b in the lower portion 11 of the stud. Relative movement is performed until the pipe 17 comes into contact with engagement. At this time, the wall surface of the splice plate 21 also comes into contact with the end surface of the inclination regulating member 11d.

  The process up to this point is the same as that under the wind load, and is the state of point A shown in FIG. 6, that is, the state of FIG. After that, the external force due to the earthquake is larger than the wind load, so it moves relative to the same direction. At this time, the round pipe 17 is biased in the relative movement direction by the inner peripheral surface of the round hole 11b in the lower part 11 of the stud, so that the two splice plates 21 that move together with the round pipe 17 are relative to the upper part 12 of the stud. The upper friction damper 20 moves and generates a frictional force. Thus, even when a frictional force is generated in the upper friction damper 20, the splice plate 21 does not tilt because the splice plate 21 is in contact with the tilt regulating member 11d as described above. The transition from the generation of the friction force in the lower friction damper 30 to the generation of the friction force in the upper friction damper can be performed stably.

  A ′ point shows a state immediately after the round pipe 17 starts to be urged in the relative movement direction by the inner peripheral surface of the round hole 11b in the lower part 11 of the stud, and F point shows the state shown in FIG. This shows a state where the relative displacement amount δ reaches the maximum δ1 due to the external force due to the earthquake acting and the two splice plates 21 relatively moving in a predetermined direction with respect to the upper portion 12 of the stud.

  Point G shows the state immediately after the relative movement direction of the two splice plates 21 with respect to the upper portion 12 of the stud is reversed. When the direction of relative movement due to the earthquake is reversed, the lower friction damper 30 having a small pressure contact force acts first. That is, first, the lower part 11 of the stud is moved relative to the round pipe 17 by the gap S between the round hole 11 b and the round pipe 17. Point H is the state shown in FIG. 8B, and shows the state where the lower friction damper 30 is acted after the relative movement direction is reversed.

  After that, due to the external force of the earthquake, it continues to move in the same direction as the reversed direction. At this time, the two splice plates 21 that move together with the round pipe 17 are energized by the round pipe 17 being urged by the inner peripheral surface of the round hole 11b of the lower part 11 of the stud in the direction opposite to the state of the line segment A′F. However, the upper friction damper 20 generates a frictional force relative to the upper portion 12 of the stud.

  Point I shows a state immediately after the relative direction is reversed, the lower friction damper 30 is applied, and the upper friction damper 20 is started to operate. Point J is in the state shown in FIG. 8C. After the direction of relative movement due to the external force due to the earthquake is reversed, the relative displacement amount δ of the two splice plates 21 with respect to the upper portion 12 of the stud is maximum −δ1. This shows the state. Point K shows a state immediately after the relative movement direction of the upper part 12 of the stud 12 with respect to the two splice plates 21 is reversed again.

  Immediately after the relative movement direction of the upper portion 12 of the stud 12 with respect to the two splice plates 21 is reversed again, the lower friction damper 30 having a small pressure contact force acts first as in the point G. That is, first, the lower part 11 of the stud is moved relative to the round pipe 17 by the gap S between the round hole 11 b and the round pipe 17. L point is a state shown in FIG. 8D, and shows a state where the lower friction damper 30 is acted after the relative movement direction is reversed again.

  After that, it continues to move in the same direction as it is due to the external force of the earthquake. At this time, when the round pipe 17 is urged by the inner peripheral surface of the round hole 11b in the lower part 11 of the stud in the same direction as the line segment A′F, the two splice plates 21 that move together with the round pipe 17 are used. However, the upper friction damper 20 generates a frictional force relative to the upper portion 12 of the stud.

  Point M shows a state immediately after the upper friction damper 20 starts to act after the lower friction damper 30 acts after the relative movement direction is reversed. Thereafter, the upper friction damper 20 returns to the state of the F point. That is, when an external force due to an earthquake is applied, such a cycle is repeated.

  Since three sets of the friction damper units 25 are arranged side by side in the relative movement direction on the intermediate pillar 10 of the present embodiment, each of them functions individually to attenuate the vibration caused by the wind load and the earthquake. Is possible.

  According to the vibration suppression structure of the joint portion of the present embodiment, the plate urged by the lower friction damper 30 which is a lower joint portion in which the lower part of the stud 11 and the two splice plates 21 are stacked so as to be relatively movable. The disc spring laminated body 8 in which the pressure contact force of the spring laminated body 8 is urged by an upper friction damper 20 which is a second joint portion in which the two splice plates 21 and the upper part 12 of the studs 12 are overlapped so as to be relatively movable. Since the frictional force generated at the first joint is smaller than the frictional force generated at the second joint, the lower friction damper 30 is relatively less than the upper friction damper 20 by relative force. Move and absorb vibration energy.

  Further, since the lower friction damper 30 has a smaller allowable relative movement amount than the upper friction damper 20, the vibration energy is absorbed when the relative movement amount is small. When vibration with a large vibration energy and a large amplitude is input, the two splice plates 21 and the upper part 12 of the stud are relatively moved by the upper friction damper 20 to suppress the vibration. For this reason, the lower friction damper 30 absorbs vibration energy with a small relative movement amount to suppress small vibrations, and the upper friction damper 20 absorbs vibration energy with a large relative movement amount to suppress large vibrations. Is possible.

  More specifically, when vibration is input to a building or the like in which the friction damper unit 25 is provided, first, the lower friction damper 30 relatively moves between the lower portion 11 of the stud and the two splice plates 21. Energy is absorbed. When the relative movement amount due to the input vibration exceeds the clearance S between the round pipe 17 and the round hole 11b, which is the allowable relative movement amount of the lower friction damper 30, the round pipe constituting the lower friction damper 30 Through 17, the force of relative movement of the two splice plates 21 and the upper part 12 of the studs is transmitted to the upper friction damper 20. That is, when the input vibration exceeds the relative movement force allowed by the lower friction damper 30, the vibration is transmitted to the upper friction damper 20, and the vibration energy is absorbed by the upper friction damper 20. For this reason, it is possible to absorb vibration energy by the lower friction damper 30 for the small vibration and the upper friction damper 20 for the large vibration without providing the control means for the lower friction damper 30 and the upper friction damper 20, respectively. is there.

  Further, since the force for moving the two splice plates 21 and the upper part of the inter-column 12 relative to each other is transmitted from the lower part 11 of the inter-column to the two splice plates 21 via the round pipe 17, the force is inserted into the round pipe 17. The high-strength bolt 16 is prevented from receiving a shearing force generated at the time of relative movement, and the high-strength bolt 16 can be used exclusively for the application of the pressure contact force, and the soundness can be maintained high. . At this time, by sandwiching the lower part 11 and the upper part 12 between the two splice plates 21 from both sides, the two splice plates 21 are moved relative to the lower part 11 and the upper part 12 in a stable state. And stable frictional force can be generated.

  In addition, a sliding plate 26 provided on the lower part 11 and the upper part 12 of the stud and two splice plates 21 are slid with the sliding plate 26 when moved relative to the lower part 11 and the upper part 12 of the stud. Therefore, when the upper friction damper 20 and the lower friction damper 30 move relative to each other, a stable friction force can be generated to suppress vibration. .

  Further, since the disc spring laminated body 8 having the non-linear spring region having a small load fluctuation with respect to the deformation amount in the compression direction is used for the upper friction damper 20 and the lower friction damper 30, a more stable pressure contact force is generated. It is possible to make it. For this reason, in the vibration damping structure of the main joint, the disc spring laminated body 8 that can obtain a stable pressure contact force is used in order to change the generated frictional force between the upper friction damper 20 and the lower friction damper 30. . In addition, the disc spring laminated body 8 can easily adjust the frictional force by making the pressure contact force different by making the number of disc springs to be stacked different.

  In the vibration damping structure of the joint portion of the present embodiment, a plurality of pairs of splice plates 21 are bridged between the inter-column lower part 11 and the inter-column upper part 12, and each of the plurality of pairs of splice plates 21 is formed. And a lower friction damper 30 having an inter-column lower part 11 and an upper friction damper 20 having a plurality of pairs of splice plates 21 and an upper part 12 of an inter-column. It is possible to make the upper friction damper 20 and the lower friction damper 30 provided function independently. Specifically, even if a plurality of upper friction dampers 20 and lower friction dampers 30 are provided on a single splice plate 21, the arrangement and length of the round holes 11 b and the round pipes 17 in the friction dampers 20 and 30. If the arrangement of the holes 12a and the bolts 16 is different between the friction dampers 20 and 30, after the relative movement occurs only in one of the friction dampers 20 and 30, the other friction dampers 20 and 30 There is a possibility that appropriate relative movement does not occur and frictional force does not occur properly. However, in the present embodiment, since the friction damper unit 25 is provided for each splice plate 21, each friction damper 20, 30 functions individually, so that the damping force of each friction damper 20, 30 is reliably applied. Is possible.

  In the above embodiment, the example in which the lower friction damper 30 includes the round pipe 17 through which the high-strength bolt 16 is inserted has been described. However, the round pipe 17 may not necessarily be provided.

  In the above-described embodiment, the example in which the splice plate that is paired with the inter-column lower part 11 and the inter-column upper part 12 is bridged has been described. However, the splice plate that is spanned between two members such as the inter-column lower part 11 and the inter-column upper part 12 May be one sheet of only one of the two members. At this time, the two members may be arranged on different sides of the splice plate. Moreover, although the example which provided the friction damper unit 3 sets to the stud was demonstrated, the number of the friction damper units provided is not restricted to 3 sets.

  Moreover, although the example which provided the friction damper unit 25 in the stud 10 was demonstrated in the said embodiment, not only a stud but a brace etc. may be sufficient, for example. When the friction damper unit is installed in the brace, the spanning direction and the relative movement direction are the same, so the long holes provided in the friction damper that moves relative to each other with a large force such as an earthquake are formed along the relative movement direction. Is done.

  In the above-described embodiment, the upper friction damper 20 and the lower friction damper 30 are different from each other in the pressure contact force by the disc spring laminated body 8 included in the upper friction damper 20 and the lower friction damper 30 in order to change the generated friction force. However, the present invention is not limited to this. For example, the friction coefficient between the sliding plate and the friction plate included in the upper friction damper 20 may be different from the friction coefficient between the sliding plate and the friction plate included in the lower friction damper 30.

  Moreover, in the said embodiment, although the example using the disc spring laminated body 8 was demonstrated as a press-contact force biasing member, it is not restricted to this, For example, a coil spring, a leaf | plate spring, etc. are compressed and the press-contact force is urged | biased Any member can be used.

  The above embodiment is for facilitating the understanding of the present invention, and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

3 upper layer, 5 lower layer, 8 disc spring laminate, 10 studs,
11 Lower part of first pillar (first pressure contact plate), 11b Round hole (first through hole), 11c Upper end part,
11d Tilt restricting member,
12 upper part of the stud (second press contact plate), 12a long hole (second through hole), 12c lower end part,
16 bolt, 16a head, 17 round pipe, 18 nut,
20 upper friction damper (second joint), 21 splice plate (third press contact plate),
21a round hole, 21b round hole, 25 friction damper unit, 26 sliding plate,
28 friction plate, 30 lower friction damper (first joint), 45 washer,
46 Bush

Claims (9)

A vibration damping structure that is disposed between a pair of members that relatively move in a predetermined direction in a building frame and has a friction damper unit that suppresses the relative movement by the frictional force between the pressure-contact plates that slide with the relative movement. There,
The friction damper unit is
A first pressure contact plate provided on one member of the pair of members;
A second pressure contact plate provided on the other member of the pair of members;
A third press-contact plate pressed against the first press-contact plate and the second press-contact plate;
A first joining portion joined by a first pressure contact force biasing member that biases a pressure contact force to the first pressure contact plate and the third pressure contact plate;
A second joint portion joined by a second pressure contact force biasing member that biases a pressure contact force to the second pressure contact plate and the third pressure contact plate;
With
The first pressure contact plate includes the first through hole that is long in the predetermined direction, and allows the first movement amount to slide.
The second pressure contact plate includes a second through hole that is longer in the predetermined direction than the first through hole, and is capable of sliding a second movement amount.
The third pressure contact plate includes a third through hole and a fourth through hole,
A first bolt member provided through the first through hole and the third through hole;
A second bolt member provided through the second through hole and the fourth through hole;
Have
An anti-vibration structure comprising an inclination regulating member for regulating an inclination of the third press contact plate. The vibration damping structure according to claim 1,
A vibration damping structure characterized in that a friction force generated between the second pressure contact plate and the third pressure contact plate is higher than a friction force generated between the first pressure contact plate and the third pressure contact plate. The vibration damping structure according to claim 1 or 2,
The vibration control structure according to claim 1, wherein a biasing force in the second joint portion is higher than a biasing force in the first joint portion. A vibration damping structure according to any one of claims 1 to 3,
The first press contact plate and the second press contact plate are opposed to each other with their ends spaced apart from each other.
The damping structure according to claim 1, wherein the third press contact plate is stretched between the first press contact plate and the second press contact plate. A vibration damping structure according to any one of claims 1 to 4,
The first bolt member is provided through a pipe member,
The vibration control structure according to claim 1, wherein the force of the relative movement between the second pressure contact plate and the third pressure contact plate is transmitted to the second joint through the pipe member. The vibration damping structure according to claim 5,
When the pipe member engages with the first through-hole at the first joint portion, a force of relative movement between the second pressure contact plate and the third pressure contact plate is transmitted to the third pressure contact plate. Damping structure characterized by that. A vibration damping structure according to any one of claims 1 to 6,
A sliding plate provided on one of the first pressing plate and the third pressing plate, and one of the second pressing plate and the third pressing plate;
The first press plate and the third press plate are provided on the other of the first press plate and the third press plate and the other of the second press plate and the third press plate. And a friction plate that slides with the sliding plate to generate the frictional force when the second pressure contact plate and the third pressure contact plate move relative to each other;
Damping structure characterized by having A vibration damping structure according to any one of claims 1 to 7,
The first pressure contact force biasing member and the second pressure contact force biasing member are disc springs;
The damping structure according to claim 1, wherein the pressure contact force biased at the first joint portion and the pressure contact force biased at the second joint portion are adjusted by the disc spring. A vibration damping structure according to any one of claims 1 to 8,
The third pressure contact plate is provided on both sides of the first pressure contact plate and the second pressure contact plate.