JP2014088916A - Vibration control structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform an appropriate adjustment of a frictional force of a friction damper generated in response to an applied load.SOLUTION: A friction damper comprises a first contacting plate 30 arranged at one member of a pair of members, a second contacting plate arranged at the other member of the pair of members, and a third contacting plate 166 slidably contacted with either the first contacting plate or the second contacting plate. The first contacting plate is provided with a first through-hole elongated in a prescribed direction to be slidable as a first moving amount. The second contacting plate is provided with a second through-hole shorter than the first through-hole to be slidable as a second moving amount, the third contacting plate is provided with a third through-hole, has a bolt member inserted and passed through the first through-hole, second through-hole and third through-hole, the plurality of friction dampers have different lengths in a prescribed direction of the second through-hole to set a stepwise second moving amount, the friction dampers slide in a stepwise manner and further the friction dampers are provided with a constant friction generating member.

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

  FIG. 10 is an explanatory diagram of the load and displacement of the friction damper unit in a certain comparative example. As shown in FIG. 10, stepwise energy absorption is performed according to the load, but it is desired to change the size of the load width P1 and adjust the frictional force generated according to the load more appropriately.

  This invention is made | formed in view of such a situation, and it aims at adjusting the frictional force which arises according to a load appropriately.

  In order to achieve such an object, in the vibration damping structure according to the present invention, the friction between the pressure plates arranged between a pair of members that move relative to each other in a predetermined direction in the building frame and slide with the relative movement. A plurality of friction dampers that suppress the relative movement by force, and a vibration damping structure in which the friction dampers interlock to suppress vibrations, and the friction dampers are provided on one of the pair of members. A first pressure plate, the second pressure plate provided on the other member of the pair of members, and a third pressure plate slidably pressed with the first pressure plate or the second pressure plate. The first pressure contact plate includes a first through hole that is long in the predetermined direction so that the first movement amount is slidable, and the second pressure contact plate is a second through hole that is shorter than the first through hole. It is possible to slide the second movement amount with a hole, and the third pressure plate is A bolt member provided through the first through hole, the second through hole, and the third through hole, wherein a plurality of the friction dampers are formed on the predetermined portion of the second through hole. The length of the direction is changed stepwise to make the second movement amount stepwise, the plurality of friction dampers slide stepwise, and a constant friction force is generated when the relative movement is performed. A vibration damping structure including a constant friction generating member.

  According to such a vibration damping structure, since the constant friction generating member is provided in the vibration damping structure in which the frictional force is switched stepwise, a constant frictional force can be generated during the relative movement of the pressure contact plates. The frictional force generated from the start to the end of relative movement can be set uniformly high. That is, the frictional force generated according to the load can be appropriately adjusted.

In this vibration damping structure, it is desirable to include a pipe member that is provided through the first through hole, the second through hole, and the third through hole while the bolt member is inserted inside.
According to such a vibration control structure, since the frictional force when the second pressure contact plate slides with respect to the first pressure contact plate and the third pressure contact plate is transmitted through the pipe member, the bolt member is connected to the pipe. It protects with a member and can maintain the soundness highly.

Further, it is desirable that the first pressure contact plate is sandwiched between the second pressure contact plate and the third pressure contact plate.
According to such a vibration damping structure, for example, a friction damper can be configured using a part of H-shaped steel.

In addition, it is desirable that the second pressure contact plate is at least one of an H-shaped steel web and a flange.
According to such a vibration damping structure, a plurality of friction dampers can be configured using a part of the H-shaped steel.

In addition, in the friction damper and the constant friction generating member, it is preferable that a member that generates a pressing force is a disc spring.
According to such a vibration damping structure, the member that generates the pressure contact force is a disc spring having a non-linear spring region in which the load variation is small with respect to the deformation amount in the pressure direction. Can do. Further, the pressure contact force can be easily adjusted by changing the number of overlapping disc springs.

A friction plate sandwiched between the first pressure contact plate and the third pressure contact plate;
A friction plate sandwiched between the first pressure contact plate and the second pressure contact plate;
A sliding plate fixedly provided on one surface and the other surface of the first pressure contact plate and in contact with the friction plate;
It is desirable to provide.
According to such a vibration damping structure, a more stable friction force can be obtained.

The constant friction generating member includes a fourth pressure contact plate provided on the one member and a fifth pressure contact plate provided on the other member, and the fourth pressure contact plate has a fourth through hole. Preferably, the fifth pressure contact plate includes a fifth through hole that is long in the predetermined direction, and has a bolt member that is provided through the fourth through hole and the fifth through hole.
According to such a vibration damping structure, for example, a plurality of friction dampers for changing the friction force in stages are arranged on the flange, and a constant friction generating member for generating a constant friction force on the web is arranged. be able to. Further, for example, a plurality of friction dampers for changing the frictional force in stages can be arranged on the web, and a constant friction generating member for generating a constant frictional force on the flange can be arranged.

A friction plate sandwiched between the fourth pressure contact plate and the fifth pressure contact plate; and a sliding plate fixedly provided on the surface of the fifth pressure contact plate and in contact with the friction plate. Also good.
According to such a vibration damping structure, a more stable friction force can be obtained.

The constant friction generating member includes a fourth through hole provided in the first pressure contact plate and a fifth through hole provided in the second pressure contact plate, and a fifth through hole long in the predetermined direction. And a bolt member provided through the fourth through hole and the fifth through hole.
According to such a vibration damping structure, for example, a plurality of friction dampers for changing the frictional force in stages on the flange or the web and a constant friction generating member for generating a constant frictional force are arranged. be able to.

Further, in the constant friction generating member, a friction plate sandwiched between the first pressure contact plate and the second pressure contact plate, and a slip which is fixedly provided on a surface of the first pressure contact plate and is in contact with the friction plate. It is good also as providing a board.
According to such a vibration damping structure, a more stable friction force can be obtained even in the constant friction generating member.

  According to the present invention, the frictional force generated according to the load is appropriately adjusted.

It is a side view of the friction damper unit 1 in a comparative example. It is AA sectional drawing in FIG. It is a top view of the friction damper unit 1 in a comparative example. It is a side view of a friction damper. It is BB sectional drawing in FIG. It is CC sectional drawing in FIG. It is BB sectional drawing in FIG. 1 when not using a round pipe. It is a top view of H-shaped steel. It is a side view of H-shaped steel. It is a graph which shows the vibration energy absorption history characteristic of a friction damper unit. It is a 1st figure explaining operation | movement of a friction damper unit. It is a 2nd figure explaining operation | movement of a friction damper unit. It is a 3rd figure explaining operation | movement of a friction damper unit. It is a 4th figure explaining operation | movement of a friction damper unit. It is a 5th figure explaining operation | movement of a friction damper unit. It is a 6th figure explaining operation | movement of a friction damper unit. It is a 7th figure explaining operation | movement of a friction damper unit. It is an 8th figure explaining operation | movement of a friction damper unit. It is a 9th figure explaining operation | movement of a friction damper unit. It is a 10th figure explaining operation | movement of a friction damper unit. It is an 11th figure explaining operation of a friction damper unit. It is a 12th figure explaining operation | movement of a friction damper unit. It is a 13th figure explaining operation of a friction damper unit. It is a 14th figure explaining operation | movement of a friction damper unit. It is a 15th figure explaining operation | movement of a friction damper unit. It is a side view of the friction damper unit 1 'in 1st Embodiment. It is A'-A 'sectional drawing in 1st Embodiment. It is a top view of friction damper unit 1 'in a 1st embodiment. It is D'-D 'sectional drawing in FIG. It is a top view of H-section steel 20 'in a 1st embodiment. It is a side view of H-section steel 20 'in a 1st embodiment. It is a figure explaining operation | movement of the friction damper unit 1 'before a movement start in 1st Embodiment. It is a figure explaining operation | movement of the friction damper unit 1 'after the movement start in 1st Embodiment. It is a graph which shows the vibration energy absorption history characteristic of the friction damper unit 1 'in 1st Embodiment. It is a side view of friction damper unit 1 '' in a 2nd embodiment. It is a perspective view of the friction damper unit 1 '' '' applied to the stud type. It is a front view of the friction damper unit 1 '' '' applied to the stud type. FIG. 5 is a simplified cross-sectional view of a friction damper unit 1 ″ ″ applied to a stud type.

  In the following, first, a friction damper unit as a comparative example will be described with reference to FIGS. Then, the embodiment will be described while comparing with the comparative example.

  FIG. 1 is a side view of a friction damper unit 1 in a comparative example. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a top view of the friction damper unit 1 in the comparative example. These drawings show a friction damper unit 1 applied to a brace of a column beam structure of a building. In these drawings, the material axis direction of the H-shaped steel 20 is the relative movement direction.

  The friction damper unit 1 includes an H-shaped steel 20 (second press contact plate), a splice plate 30 (first press contact plate), and a plurality of friction dampers 10-1 to 10-4 slidably in contact therewith. The splice plate 30 is connected to the other H-shaped steel 40 when the bolt 51 is screwed into the nut 53 via the washer 52 and the spacer 54.

  The friction damper unit 1 in the comparative example includes ten friction dampers. Here, as will be described later, because of the difference in the length of the long hole formed in the H-shaped steel 20, the ten friction dampers move in four different types relative to the H-shaped steel 20 and the splice plate 30. .

  In the friction damper unit in the comparative example, one first friction damper 10-1, one second friction damper 10-2, four third friction dampers 10-3, and four fourth friction dampers 10-4. Is provided. In FIG. 1 and FIG. 2, the same reference numerals are attached to those that perform a common relative movement in the relative movement direction. The first friction damper 10-1 and the second friction damper 10-2 are provided on the web 20 a of the H-shaped steel 10. On the other hand, the third friction damper 10-3 and the fourth friction damper 4 are provided on the flange 20 b of the H-shaped steel 10. That is, these friction dampers perform four different relative movements.

  FIG. 4 is a side view of the friction damper. 5 is a cross-sectional view taken along the line BB in FIG. 6 is a cross-sectional view taken along the line CC in FIG. As described above, the friction damper performs four different relative movements with respect to the H-shaped steel 20 and the splice plate 30, which are the lengths of the long holes 21 a, 21 b, 21 c, 21 d formed in the H-shaped steel 20. Is different, and the configuration other than the long hole in the friction damper is common.

  Therefore, here, the configuration of the friction damper will be described by taking the friction damper 10-4 as an example. The friction damper 10-4 includes a first friction plate 12-1, a second friction plate 12-2, and a third friction plate 12- that frictionally slide with the H-shaped steel 20 and the splice plate 30 that move relative to each other in the relative movement direction. 3 and a fourth friction plate 12-4.

  The second friction plate 12-2 and the third friction plate 122-3 are fixed to the upper and lower surfaces of the flange 20b of the H-shaped steel 20 so as not to move. Further, the splice plate 30 is disposed so as to sandwich the second friction plate 12-2 and the third friction plate 12-3 and to be slidable in the relative movement direction. Further, the first friction plate 12-1 and the fourth friction plate 12-4 are fixed to the press contact member 166 (third press contact plate) so as not to move.

  A sliding plate 32 (corresponding to a sliding plate) is fixed to the two splice plates 30 so as not to move on both upper and lower surfaces. Accordingly, the four friction plates 12-1 to 12-4 slide with the splice plate 30 via the sliding plate 32.

  As the above-mentioned fixing method, for example, (1) a method by adhesion, (2) surface roughness increasing treatment (shot blasting etc.) is performed on each surface constituting the fixing surface, For example, a method for preventing slippage and (3) a method by fitting.

  Furthermore, a washer 164, a disc spring laminate 161, a bush 165, and a washer 164 are provided on the pressure contact member 166. On the other hand, a pressure contact member 166 and a washer 164 are disposed under the fourth friction plate 12-4. The pressure contact member 166 is provided with a round hole that substantially contacts the round pipe 168.

  The first friction plate 12-1 to the fourth friction plate 12-4 and the H-shaped steel 20 have a slight gap with respect to the round pipe 168 in the direction crossing the relative movement direction. Further, the second friction plate 12-2, the third friction plate 12-3, and the H-shaped steel 20 are provided with a long hole 21d longer than the diameter of the round pipe 168 in the relative movement direction. Then, a high-strength bolt 162 is inserted through these and screwed into the nut 163.

  Here, the fourth friction damper 10-4 is described as an example, but the second friction plate 12-2 and the third friction damper 10-3 are also used in the first friction damper 10-1 to the third friction damper 10-3. The friction plate 12-2 is provided with a long hole having the same length as the long holes 21a, 21b, and 21c.

  Organic friction materials and inorganic friction materials can be used for the friction plates 12-1 to 12-4. 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 32 is formed of a material having corrosion resistance such as stainless steel or titanium.

  It is assumed that a load P is applied to the fourth friction damper 10-4 configured as shown in FIG. The load P is a load for moving the H-shaped steel 20 to the right relative to the splice plate 30. When such a load P is applied in the state shown in FIG. 6, the second friction plate 12-2 and the third friction plate 12-3 fixed to the flange 20 b of the H-shaped steel 20 are fixed to the splice plate 30. Slide between the sliding plate 32. That is, between the surface of the sliding plate 32 fixed to the second friction plate 12-2 and the splice plate 30, and the surface of the sliding plate 32 fixed to the third friction plate 12-3 and the splice plate 30. The sliding will occur with the frictional force of the two surfaces generated.

  When such sliding further proceeds, the left wall of the long hole 21d provided in the flange 20b comes into contact with and engages with the round pipe 168. Next, it is assumed that a further load for moving the flange 20b relative to the right side with respect to the splice plate 30 is applied. At this time, in addition to the sliding of the two surfaces described above, the first friction plate 12-1 and the fourth friction plate 12-4 also slide between the sliding plate 32 fixed to the splice plate 30. That is, at this time, it slides with the frictional force for four surfaces.

  As described above, it is possible to cause the sliding having the frictional force corresponding to the two surfaces of the friction plate and the sliding having the frictional force corresponding to the four surfaces of the friction plate to occur in one friction damper. Since the friction force generated on the two friction plates is larger than the friction force generated on the four friction plates, when the load is applied, the sliding on the two friction plates starts first. When the round pipe 168 comes into contact with and engages with the long hole 21d, the sliding on the two friction plates is completed, and the sliding on the four friction plates is started. That is, vibration is first suppressed by the frictional force of two surfaces of the friction plate, and then vibration is suppressed by a larger frictional force of the four surfaces of the friction plate.

  In the above description, the first friction plate 12-1 to the fourth friction plate 12-4 are provided. However, a configuration without these may be used. That is, the press contact member 166 may be in contact with the splice plate 30 and the H-shaped steel 20 may be in contact with the splice plate 30.

  7 is a cross-sectional view taken along the line BB in FIG. 1 when a round pipe is not used. In the above description, the example using the round pipe 168 has been described. However, as shown in FIG. 7, if the shaft 162b of the high-strength bolt plays a role of abutting and engaging with the long hole 21d, The round pipe 168 may not be used.

  By the way, in the above description, although one friction damper was described, the length of the plurality of long holes provided in the H-shaped steel 20 is varied, and the friction force is increased step by step by combining the plurality of friction dampers. It can be changed.

  FIG. 8 is a top view of the H-shaped steel. FIG. 9 is a side view of the H-shaped steel. As shown in FIGS. 8 and 9, the long hole provided in the H-shaped steel has one long hole 21a (length d1) provided on the left side of the web 20a and one long hole provided on the right side of the web 20a. There are a hole 21c (length d3), four long holes 21b (length d2) provided on the left side of the flange 20b, and four long holes 21d (length d4) provided on the right side of the flange 20b. The lengths of the long holes 21a, 21b, 21c, and 21d have a relationship of d1 <d2 <d3 <d4. On the other hand, the length of the long hole 31 provided in the splice plate 30 and the sliding plate 32 is longer than the length d4 of the long hole 21d.

  In the web 20a, the central axis extending in the relative movement direction of the long hole 21a overlaps with the central axis of the long hole 21c. In the flange 20b, the central axis extending in the relative direction of the long hole 21b overlaps the central axis of the long hole 21d. Further, the central axis of the long hole 21a extending in the crossing direction intersecting the relative movement direction overlaps with the central axis of the long hole 21b. Further, the central axis of the long hole 21c extending in the intersecting direction overlaps the central axis of the long hole 21d.

  Thus, by setting it as the structure which overlaps the central axis of each long hole, the moving range of a friction damper can be prescribed | regulated equally and a vibration can be suppressed efficiently.

  In the first friction damper 10-1 to the fourth friction damper 10-4, the difference in configuration is the length of the long hole provided in the H-shaped steel 20, and other configurations such as a disc spring are common. To do. That is, the long hole having the length d1 is the first friction damper 10-1, the d2 one is the second friction damper 10-2, and the d3 one is the third friction damper 10-3. The thing of d4 is the 4th friction damper 10-4. That is, depending on the position where the long hole is provided, each friction damper can be provided at an appropriate position.

  FIG. 10 is a graph showing the vibration energy absorption history characteristics of the friction damper unit. In this graph, the horizontal axis indicates the relative displacement amount δ in the relative movement direction, and the vertical axis indicates the total sum of the frictional forces generated by the friction dampers 10-1 to 10-4.

  FIG. 11 is a first diagram illustrating the operation of the friction damper unit. The lower part of FIG. 11 shows the first friction damper 10-1 and the third friction damper 10-3 in the DD section of FIG. That is, the friction damper of the web 20a of the H-shaped steel 20 is shown. Further, in the upper part of FIG. 11, the second friction damper 10-2 and the fourth friction damper 10-4 in the EE cross section of FIG. 2 are shown. That is, the friction damper of the flange 20b of the H-shaped steel 20 is shown.

  In FIG. 11, only the H-shaped steel web 20a, the H-shaped steel flange 20b, the splice plate 30, the pressure contact member 166, and the high-strength bolt shaft 162b are schematically shown in order to facilitate the explanation of the relative movement of each part. Has been shown. Further, originally, the installation direction of the friction damper provided on the web 20a and the installation direction of the friction damper provided on the flange 20b are orthogonal to each other, but in order to facilitate understanding of movement in the relative movement direction. Is displayed with the installation direction of both.

  Further, four second friction dampers 10-2 are provided on the flange 20b. Since these perform the same operation in the relative movement direction, only one is shown in FIG. Further, four fourth friction dampers 10-4 are also provided on the flange 20b. Since these also perform the same operation in the relative movement direction, only one is shown in FIG.

  A case where a load in the relative movement direction acts on the friction damper unit 1 in such a configuration will be described. In the explanatory diagrams of the operation of these friction damper units, the case where the H-shaped steel 20 moves relative to the right side with respect to the splice plate 30 is expressed as both positive and negative in FIG.

  The state of FIG. 11 corresponds to the Sp0 point in FIG. That is, a load in the relative movement direction is not applied between the H-shaped steel 20 and the splice plate 30 or even if it is applied, the load is smaller than the load indicated by the Sp1 point. This is a state in which no relative movement has occurred.

  When a load exceeding the Sp1 point is applied between the H-shaped steel 20 and the splice plate 30, the H-shaped steel 20 moves relative to the splice plate 30 to the right. At this time, the H-shaped steel 20 relatively moves to the right with respect to the pressure contact member 166 of the first friction damper 10-1 to the fourth friction damper 10-4. In the first friction damper 10-1 to the fourth friction damper 10-4, a frictional force is generated when the splice plate 30 and the H-shaped steel 20 are relatively moved.

  FIG. 12 is a second diagram illustrating the operation of the friction damper unit. In the state of the Sp0 point in FIG. 10, when a load exceeding the Sp1 point is applied and relative movement is performed, the arrangement of each part as shown in FIG. 12 is obtained. This corresponds to the state at the point Sp2 in FIG. In this state, as a result of the H-shaped steel 20 moving relative to the right side with respect to the splice plate 30, the high-strength bolt shaft 162b (hereinafter simply referred to as the shaft 162b) of the first damper 10-1 is placed on the left wall of the long hole 21a. It is in a state of abutting engagement. Therefore, when the H-shaped steel 20 further attempts to move relative to the right side with respect to the splice plate 30, the first friction damper 10-1 must move relative to the splice plate 30.

  When a load exceeding the Sp6 point is further applied from the state of the Sp2 point in FIG. 10 (FIG. 12), the H-shaped steel 20 moves relative to the splice plate 30 to the right. Since the high-strength bolt shaft 162b of the first friction damper 10-1 is in contact with and engaged with the long hole 21a, when the H-shaped steel 20 moves relative to the right side with respect to the splice plate 30, the first friction damper 10- In the first to fourth friction dampers 10-4, a frictional force is generated when the splice plate 30 and the H-shaped steel 20 are relatively moved. In the first friction damper 10-1, the pressure contact member 166 and the splice plate 30 are A frictional force is also generated when the relative movement occurs.

  FIG. 13 is a third diagram for explaining the operation of the friction damper unit. In the state of the Sp2 point in FIG. 10, when a load exceeding the Sp6 point is applied and relative movement is performed, the respective parts are arranged as shown in FIG. This corresponds to the state at the point Sp7 in FIG. This state is a state in which the shaft 162b of the second friction damper 10-2 comes into contact with and engages with the left wall of the long hole 21b as a result of the H-shaped steel 20 relatively moving to the right with respect to the splice plate 30. Therefore, when the H-shaped steel 20 further moves relative to the right side with respect to the splice plate 30, the second friction damper 10-2 must also move relative to the splice plate 30.

  When a load exceeding the Sp8 point is further applied from the state of the Sp7 point in FIG. 10 (FIG. 13), the H-shaped steel 20 moves relative to the splice plate 30 to the right. Since the shaft 162b of the first friction damper 10-1 is in contact with and engaging with the long hole 21a, and the shaft 162b of the second friction damper 10-2 is also in contact with and engaging with the long hole 21b, the H-shaped steel 20 is spliced. When the relative movement to the right side with respect to the plate 30 occurs, the first friction damper 10-1 to the fourth friction damper 10-4 generate a frictional force when the splice plate 30 and the H-shaped steel 20 move relative to each other. In the friction damper 10-1 and the second friction damper 10-2, a frictional force is also generated when the pressure contact member 166 and the splice plate 30 move relative to each other.

  FIG. 14 is a fourth diagram illustrating the operation of the friction damper unit. In the state of the Sp7 point in FIG. 10, when a load exceeding the Sp8 point is applied and relative movement is performed, the respective parts are arranged as shown in FIG. This corresponds to the state of the Sp9 point in FIG. This state is a state in which the shaft 162b of the third friction damper 10-3 is in contact with and engaged with the left wall of the long hole 21c as a result of the H-shaped steel 20 relatively moving to the right with respect to the splice plate 30. Therefore, when the H-shaped steel 20 further moves relative to the right side with respect to the splice plate 30, the third friction damper 10-3 must also move relative to the splice plate 30.

  When a load exceeding the Sp10 point is further applied from the state of the Sp9 point in FIG. 10 (FIG. 14), the H-shaped steel 20 moves relative to the right side with respect to the splice plate 30. The shaft 162b of the first friction damper 10-1 abuts and engages with the long hole 21a, the shaft 162b of the second friction damper 10-2 also abuts and engages with the long hole 21b, and the third friction damper 10-3 Since the shaft 162b is also in contact with and engaged with the long hole 21c, when the H-shaped steel 20 moves relative to the right side with respect to the splice plate 30, the first friction damper 10-1 to the fourth friction damper 10-4 are spliced. A friction force is generated when the plate 30 and the H-shaped steel 20 are relatively moved, and in the first friction damper 10-1 to the third friction damper 10-3, the pressure contact member 166 and the splice plate 30 are relatively moved. The frictional force is also generated.

  FIG. 15 is a fifth diagram illustrating the operation of the friction damper unit. In the state of the Sp9 point in FIG. 10, when a load exceeding the Sp10 point is applied and the relative movement is performed, the respective parts are arranged as shown in FIG. This corresponds to the state at the point Sp11 in FIG. This state is a state in which the shaft 162b of the fourth friction damper 10-4 is in contact with and engaged with the left wall of the long hole 21d as a result of the H-shaped steel 20 relatively moving to the right with respect to the splice plate 30. Therefore, when the H-shaped steel 20 further moves relative to the right side with respect to the splice plate 30, the fourth friction damper 10-4 must also move relative to the splice plate 30.

  When a load exceeding the Sp12 point is further applied from the state of the Sp11 point in FIG. 10 (FIG. 15), the H-shaped steel 20 moves relative to the right side with respect to the splice plate 30. Since the shaft 162b of the first friction damper 10-1 to the shaft 162b of the fourth friction damper 10-4 are in contact with the long holes 21a, 21b, 21c, 21d, the H-shaped steel 20 is spliced. When the first friction damper 10-1 to the fourth friction damper 10-4 move relative to the right side with respect to the frictional force, a frictional force is generated when the splice plate 30 and the H-shaped steel 20 move relative to each other. A frictional force is also generated when the splice plate 30 and the splice plate 30 move relative to each other.

  FIG. 16 is a sixth diagram illustrating the operation of the friction damper unit. In the state of the Sp11 point in FIG. 10, when a load exceeding the Sp12 point is applied and the relative movement is performed, the respective parts are arranged as shown in FIG. This corresponds to the state at the point Sp13 in FIG. In this state, as a result of the H-shaped steel 20 moving to the right relative to the splice plate 30, the first friction damper 10-1 to the fourth friction damper 10-4 move relative to the splice plate 30 and the first friction The shaft 162b of the damper 10-1 is in contact with and engaged with the long hole 31. This state is a state of limit deformation, but it is actually designed so as not to reach this state. Here, for convenience of explaining the limit deformation, only the state in which the shaft 162b of the first friction damper 10-1 is in contact with and engaged with the long hole 31 is shown.

  Next, the direction of the applied load is reversed. That is, a load for moving the H-shaped steel 20 to the left relative to the splice plate 30 is applied.

  When a negative load exceeding the Sp14 point is applied from the state of the Sp13 point in FIG. 10 (FIG. 16), the H-shaped steel 20 moves relative to the splice plate 30 to the left. At this time, in the first friction damper 10-1 to the fourth friction damper 10-4, a frictional force is generated when the splice plate 30 and the H-shaped steel 20 move relative to each other.

  FIG. 17 is a seventh diagram illustrating the operation of the friction damper unit. In the state of point Sp13 in FIG. 10, when a load that exceeds the point Sp14 in the minus direction is applied and relative movement is performed, the components are arranged as shown in FIG. This corresponds to the state of point Sp15 in FIG. This state is a state in which the right wall of the long hole 21a is in contact with and engaged with the shaft 162b of the first friction damper 10-1 as a result of the H-shaped steel 20 relatively moving to the left with respect to the splice plate 30.

  When a negative load exceeding the Sp16 point is applied from the state of the Sp15 point in FIG. 10 (FIG. 17), the H-shaped steel 20 moves relative to the left side with respect to the splice plate 30. At this time, in the first friction damper 10-1 to the fourth friction damper 10-4, a frictional force is generated when the splice plate 30 and the H-shaped steel 20 are relatively moved, and in the first friction damper 10-1, A frictional force is also generated when the pressure contact member 166 and the splice plate 30 move relative to each other.

  FIG. 18 is an eighth diagram illustrating the operation of the friction damper unit. In the state of point Sp15 in FIG. 10, when a load that exceeds the point Sp16 in the minus direction is applied and relative movement is performed, the components are arranged as shown in FIG. This corresponds to the state at the point Sp17 in FIG. This state is a state in which the right wall of the long hole 21b is in contact with and engaged with the shaft 162b of the second friction damper 10-2 as a result of the H-shaped steel 20 relatively moving to the left with respect to the splice plate 30.

  When a negative load exceeding the Sp18 point is applied from the state of the Sp17 point in FIG. 10 (FIG. 18), the H-shaped steel 20 moves relative to the splice plate 30 to the left. At this time, in the first friction damper 10-1 to the fourth friction damper 10-4, a frictional force is generated when the splice plate 30 and the H-shaped steel 20 are relatively moved, and the first friction damper 10-1 and the second friction damper 10-1 In the friction damper 10-2, a frictional force is also generated when the pressure contact member 166 and the splice plate 30 move relative to each other.

  FIG. 19 is a ninth diagram illustrating the operation of the friction damper unit. In the state of point Sp17 in FIG. 10, when a load that exceeds the point Sp18 in the minus direction is applied and relative movement is performed, the components are arranged as shown in FIG. This corresponds to the state at point Sp19 in FIG. This state is a state in which the right wall of the long hole 21c comes into contact with and engages with the shaft 162b of the third friction damper 10-3 as a result of the H-shaped steel 20 relatively moving to the left with respect to the splice plate 30.

  When a negative load exceeding the Sp20 point is applied from the state of the Sp19 point in FIG. 10 (FIG. 19), the H-shaped steel 20 moves relative to the left side with respect to the splice plate 30. At this time, in the first friction damper 10-1 to the fourth friction damper 10-4, a frictional force is generated when the splice plate 30 and the H-shaped steel 20 are relatively moved, and the first friction damper 10-1 to the third friction damper 10-1 to the third friction damper 10-4. In the friction damper 10-3, a frictional force is also generated when the pressure contact member 166 and the splice plate 30 move relative to each other.

  FIG. 20 is a tenth view for explaining the operation of the friction damper unit. In the state of the Sp19 point in FIG. 10, when a load that exceeds the Sp20 point in the minus direction is applied and the relative movement is performed, the components are arranged as shown in FIG. This corresponds to the state at the point Sp21 in FIG. This state is a state in which the right wall of the long hole 21d is in contact with and engaged with the shaft 162b of the fourth friction damper 10-4 as a result of the H-shaped steel 20 relatively moving to the left with respect to the splice plate 30.

  When a negative load exceeding the Sp22 point is applied from the state of Sp21 in FIG. 10 (FIG. 20), the H-shaped steel 20 moves relative to the left side with respect to the splice plate 30. At this time, in the first friction damper 10-1 to the fourth friction damper 10-4, a frictional force is generated when the splice plate 30 and the H-shaped steel 20 are relatively moved, and the first friction damper 10-1 to the fourth friction damper 10-4. In the friction damper 10-4, a frictional force is generated when the pressure contact member 166 and the splice plate 30 move relative to each other.

  FIG. 21 is an eleventh view for explaining the operation of the friction damper unit. In the state of the Sp21 point in FIG. 10, when a load that exceeds the Sp22 point in the minus direction is applied and relative movement is performed, the components are arranged as shown in FIG. This corresponds to the state at the point Sp23 in FIG. This state is a state in which the shaft 162b of the first friction damper 10-1 is in contact with and engaged with the long hole 31 of the splice plate 30 as a result of the H-shaped steel 22 relatively moving to the left with respect to the splice plate 30.

  This state is also a state of limit deformation, but as described above, it is designed so that this state is not actually reached. Here, for convenience of explaining the state of limit deformation, only the state in which the shaft 162b of the first friction damper 10-1 is in contact with and engaged with the long hole 31 of the splice plate 30 is shown.

  Next, the direction of the applied load is reversed again. That is, a load for moving the H-shaped steel 20 to the right side relative to the splice plate 30 is applied.

  When a load exceeding the Sp24 point is applied from the state of the Sp23 point in FIG. 10 (FIG. 21), the H-shaped steel 20 moves relative to the splice plate 30 to the right. At this time, in the first friction damper 10-1 to the fourth friction damper 10-4, a frictional force is generated when the splice plate 30 and the H-shaped steel 20 move relative to each other.

  FIG. 22 is a twelfth view for explaining the operation of the friction damper unit. In the state of the Sp23 point in FIG. 10, when a load exceeding the Sp24 point is applied and the relative movement is performed, the components are arranged as shown in FIG. This corresponds to the state at the point Sp25 in FIG. This state is a state in which the shaft 162b of the first friction damper 10-1 is in contact with the left wall of the long hole 31 of the splice plate 30 as a result of the relative movement of the H-shaped steel 20 to the right with respect to the splice plate 30. is there.

  When a load exceeding the Sp26 point is applied from the state of the Sp25 point in FIG. 10 (FIG. 22), the H-shaped steel 20 moves relative to the splice plate 30 to the right. At this time, in the first friction damper 10-1 to the fourth friction damper 10-4, a frictional force is generated when the splice plate 30 and the H-shaped steel 20 are relatively moved, and in the first friction damper 10-1, A frictional force is generated when the pressure contact member 166 and the splice plate 30 move relative to each other.

  FIG. 23 is a thirteenth view for explaining the operation of the friction damper unit. In the state of the Sp25 point in FIG. 10, when a load exceeding the Sp26 point is applied and the relative movement is performed, the respective parts are arranged as shown in FIG. This corresponds to the state of point Sp27 in FIG. In this state, as a result of the H-shaped steel 20 moving relative to the right side with respect to the splice plate 30, the shaft 162b of the second friction damper 10-2 is in contact with and engaging with the left wall of the long hole 32 of the splice plate 30. is there.

  When a load exceeding the Sp28 point is applied from the state of the Sp27 point in FIG. 10 (FIG. 23), the H-shaped steel 20 moves relative to the splice plate 30 to the right. At this time, in the first friction damper 10-1 to the fourth friction damper 10-4, a frictional force is generated when the splice plate 30 and the H-shaped steel 20 are relatively moved, and the first friction damper 10-1 and the second friction damper 10-1 In the friction damper 10-2, a frictional force is generated when the pressure contact member 166 and the splice plate 30 move relative to each other.

  FIG. 24 is a fourteenth view for explaining the operation of the friction damper unit. In the state of point Sp27 in FIG. 10, when a load exceeding point Sp28 is applied and the relative movement is performed, the respective parts are arranged as shown in FIG. This corresponds to the state of the Sp29 point in FIG. In this state, as a result of the H-shaped steel 20 moving relative to the right side with respect to the splice plate 30, the shaft 162b of the third friction damper 10-3 is in contact with the left wall of the long hole 33 of the splice plate 30. is there.

  When a load exceeding the Sp30 point is applied from the state of the Sp29 point in FIG. At this time, in the first friction damper 10-1 to the fourth friction damper 10-4, a frictional force is generated when the splice plate 30 and the H-shaped steel 20 are relatively moved, and the first friction damper 10-1 to the third friction damper 10-1 to the third friction damper 10-4. In the friction damper 10-3, a frictional force is generated when the pressure contact member 166 and the splice plate 30 move relative to each other.

  FIG. 25 is a fifteenth view illustrating the operation of the friction damper unit. In the state of the Sp29 point in FIG. 10, when a load exceeding the Sp30 point is applied and the relative movement is performed, the respective parts are arranged as shown in FIG. This corresponds to the state of the Sp31 point in FIG. This state is a state in which the shaft 162b of the fourth friction damper 10-4 is in contact with the left wall of the post 34 of the splice plate 30 as a result of the relative movement of the H-shaped steel 20 to the right side with respect to the splice plate 30. .

  When a load exceeding the Sp32 point is applied from the state of the Sp31 point in FIG. 10 (FIG. 25), the H-shaped steel 20 moves relative to the splice plate 30 to the right. At this time, in the first friction damper 10-1 to the fourth friction damper 10-4, a frictional force is generated when the splice plate 30 and the H-shaped steel 20 are relatively moved, and the pressure contact member 166 and the splice plate 30 are relatively A frictional force is generated when it moves. And it will be in the state of Sp13 point of FIG.

  On the other hand, when the repeated load applied is small, it is as follows.

  When a load exceeding the Sp3 point is applied in the minus direction from the state of the Sp2 point in FIG. 10 (FIG. 12), the H-shaped steel 20 moves relative to the splice plate 30 to the left. At this time, the relative movement of the long hole 21a is performed, and the shaft 162b of the first friction damper 10-1 contacts and engages the right wall of the long hole 21a. This state corresponds to the state at the point Sp4 in FIG. When a load exceeding Sp5 is applied from the state of the Sp4 point, the H-shaped steel 20 moves relative to the splice plate 30 to the right. At this time, the relative movement of the long hole 21a is performed again, and the shaft 162b of the first friction damper 10-1 comes into contact with and engages with the left wall of the long hole 21a. This state corresponds to the state of Sp2.

  Next, when a load exceeding the point Qp1 is applied in the minus direction from the state of Sp7 in FIG. 10 (FIG. 13), the H-shaped steel 20 moves relative to the splice plate 30 to the left. And the relative movement for the long hole 21a is performed, and the shaft 162b of the first friction damper 10-1 comes into contact with and engages with the right wall of the long hole 21a. This state corresponds to the state at point Qp2 in FIG.

  Furthermore, when a load exceeding the Qp3 point is applied in the minus direction from the state of the Qp2 point in FIG. 10, the H-shaped steel 20 moves relative to the splice plate 30 to the left. Then, the shaft 162b of the second friction damper 10-2 comes into contact with and engages with the right wall of the long hole 21b. This state corresponds to the state at point Qp4 in FIG.

  When a load exceeding Qp5 point is applied in the plus direction from the state of Qp4 point in FIG. 10, H-shaped steel 20 moves relative to the splice plate 30 to the right. The shaft 162b of the first friction damper 10-1 is in contact with and engaged with the left wall of the long hole 21a. This state corresponds to the state of the Sp1 point in FIG. Furthermore, when a load exceeding the point Qp6 is applied in the plus direction from the state of the point Sp1 in FIG. 10, the H-shaped steel moves relative to the splice plate 30 to the right. The shaft 162b of the second friction damper 10-2 is brought into contact with and engaged with the left wall of the long hole 21a. This state corresponds to the state at the point Sp7 in FIG.

  The operation shown by the broken line in FIG. 10 is similarly established when the load reverses to the minus side at the Sp9 point or when the load reverses to the minus side at the Sp11 point. In this case, the shaft 162b of the third friction damper 10-3 and the shaft 162b of the fourth friction damper 10-4 also operate to contact and engage with the long holes 21c and 21d, respectively.

  By doing in this way, in the friction damper unit 1 of the said comparative example, the frictional force produced in steps according to a load can be changed, and an appropriate frictional force can be produced.

  In the comparative example, since the sliding plates 32 are provided on both surfaces of the splice plate 30, when the first friction plate 12-1 to the fourth friction plate 12-4 move relative to the splice plate 30. It is possible to suppress vibrations by generating a stable frictional force.

  In the comparative example described above, since the disc spring laminated body 161 including the nonlinear spring region in which the load fluctuation is small with respect to the deformation amount in the compression direction is adopted, it is possible to generate a more stable pressure contact force. is there.

  In addition, the attachment position of the 1st friction damper 10-1 to the 4th friction damper 10-4 is not restricted above. For example, the second friction damper 10-2 and the fourth friction damper 10-4 may be attached to the web 20a. Also. The first friction damper 10-1 and the third friction damper 10-3 may be attached to the flange 20b.

  In the comparative example, one first friction damper 10-1 and one third friction damper 10-3 are provided. In addition, four second friction dampers 10-2 and four fourth friction dampers 10-4 are provided. Therefore, in FIG. 10, for example, the load width from Sp2 to Sp6 is different from the load width from Sp7 to Sp8.

  However, if the same number of each of the first friction damper 10-1 to the fourth friction damper 10-4 is provided, these load widths are constant when friction plates having the same friction coefficient are used. It becomes. That is, these load widths can be adjusted by the number of friction dampers.

  In FIG. 10, the load width P1 and the load width P2 are shown as the same load width. However, the load widths P1 and P2 can be adjusted by changing the friction coefficients of the friction plate 12 and the sliding plate 32. it can. However, when changing a friction coefficient etc., it is necessary to change the material of the friction board 12 and the sliding board 32 between corresponding friction dampers. Since making these materials different leads to high costs, it is desirable that the load width can be adjusted without adopting a configuration that changes the friction coefficient or the like.

  In the embodiment described below, the load width P1 can be set larger without making the materials of the friction plate 12 and the sliding plate 32 different between the friction dampers.

  Hereinafter, the friction damper unit 1 ′ in the first embodiment will be described. Note that the description of the configuration common to the above-described comparative example is omitted, and points different from the comparative example are described.

  FIG. 26 is a side view of the friction damper unit 1 ′ in the first embodiment. FIG. 27 is a cross-sectional view taken along the line A′-A ′ in the first embodiment. FIG. 28 is a top view of the friction damper unit 1 ′ in the first embodiment. 29 is a cross-sectional view taken along the line D'-D 'in FIG. FIG. 30 is a top view of the H-shaped steel 20 ′ in the first embodiment. FIG. 31 is a side view of the H-section steel 20 ′ in the first embodiment. In the first embodiment, “′” (dash) is added to the reference numerals for portions different from the comparative example.

  In the first embodiment, the positions of the long holes formed in the H-shaped steel 20 'are different from those of the comparative example (see FIGS. 30 and 31). In the first embodiment, for ease of explanation, the number of each of the first friction damper 10-1 to the fourth friction damper 10-4 is two. All the friction dampers are provided on the flange 20b '. Therefore, the long holes 21a, 21b, 21c, and 21d are provided in the flange 20b 'of the H-shaped steel 20', respectively.

  On the other hand, the web 20a 'is provided with two constant friction dampers 10-5 as constant friction generating members. Therefore, two long holes 21z longer than the long holes 21a are provided in the web of the H-shaped steel 20 '.

  Hereinafter, the constant friction damper 10-5 will be described with reference to a cross-sectional view shown in FIG. A sliding plate 32 'is fixed to both surfaces of the web 20a' of the H-shaped steel 20 'so as not to move. The fifth friction plate 12-5, the splice plate 30, and the washer 164 are arranged so as to sandwich both surfaces thereof. Further, a disc spring laminated body 161, a bush 165, and a washer 164 are provided on the washer 164. The splice plate 30 and the fifth friction plate 10-5 are provided with a round hole (corresponding to a fourth through hole) so as to substantially contact the high-strength bolt 162.

  The high-strength bolt 162 is inserted into the splice plate 30, the fifth friction plate 12-5, the sliding plate 32 ', and the web 20a'. Then, the washer 164, the bushing 165, and the round pipe 168 are inserted and screwed into the nut 163.

  Thus, since the constant friction damper 10-5 having the above-described configuration is provided on the web 20a ′, when the web 20a ′ and the splice plate 30 are loaded and relatively moved, the fifth friction plate 12-5 and the sliding plate 32 ′. Slides. A frictional force is generated in the two fifth friction plates 12-5 for each constant friction damper 10-5.

  FIG. 32 is a view for explaining the operation of the friction damper unit before the movement starts in the first embodiment. FIG. 33 is a diagram for explaining the operation of the friction damper unit after starting movement in the first embodiment. Hereinafter, the initial movements of the first friction damper 10-1 to the fourth friction damper 10-4 and the constant friction damper 10-5 will be described with reference to these drawings.

  32 and 33, the configuration drawn at the top is a simplified E′-E ′ cross-sectional view at the flange, and the configuration drawn at the center is a simplified C′-C at the flange. 'Cross-sectional view, the configuration depicted at the bottom is a simplified D'-D' cross-sectional view in the web.

  32 and 33, in order to facilitate explanation of the relative movement of each part, an H-shaped steel web 20a ′, an H-shaped steel flange 20b ′, a splice plate 30 ′, a pressure contact member 166, and a high-strength bolt 162b are provided. It is shown schematically. Further, originally, the installation direction of the friction damper provided on the web 20a and the installation direction of the friction damper provided on the flange 20b ′ are orthogonal to each other, but it is easy to understand the movement in the relative movement direction. Therefore, both installation directions are aligned and displayed.

  The arrangement in FIG. 32 is an arrangement in an initial state where no load is applied to the friction damper unit 1 in the first embodiment. On the other hand, the arrangement in FIG. 33 shows a state in which an initial load is applied to the H-shaped steel 20 ′ and the splice plate 30 ′. That is, FIG. 33 corresponds to FIG. 12 in the comparative example. Therefore, the movement of the first friction damper 10-1 to the fourth friction damper 10-4 and the principle of the frictional force to be generated are the same as those of the comparative example described above.

  On the other hand, in the first embodiment, two constant friction dampers 10-5 are provided. In the constant friction damper 10-5, the high-strength bolt 162 is inserted into the through hole (fourth through hole) of the splice plate 30 ′, so that the relative movement is performed between the web 20a ′ and the splice plate 30 ′. When this occurs, a frictional force is generated in the two fifth friction plates 12-5 as described above. That is, the frictional force is surely generated from the initial movement of the web 20a 'and the splice plate 30' to the end of the movement. This means that by providing the constant friction damper 10-5, a constant friction force can be applied to the friction damper unit 1 '.

  Here, only the start of the movement of the splice plate, the web, and the flange has been described, but the principle that the first friction damper 10-1 to the fourth friction damper 10-4 generate a frictional force in stages is described. The same as the comparative example. Therefore, description of these movements after the start of movement is omitted.

  As described above, the constant friction damper 10-5 must generate relative friction between the web 20a 'and the splice plate 30'. The friction force generated by the constant friction damper 10-5 is added to the friction force generated by the friction damper 10-4 stepwise.

  FIG. 34 is a graph showing vibration energy absorption history characteristics of the friction damper unit 1 ′ in the first embodiment. As described above, the vibration energy absorption history characteristic in the first embodiment is that the friction of the constant friction damper 10-5 is caused by the frictional force generated by the fourth friction damper 10-4 from the first friction damper 10-1 in a stepwise manner. The power is added.

  In the method of the comparative example, in order to make the load width P1 larger than the load width P2, the friction coefficient of the friction plate needs to be different between the corresponding friction dampers. For this reason, there is a problem that the cost increases because the types of friction plates are increased. However, as in the first embodiment, the constant friction damper 10-5 is added to the stepped friction damper unit by the first friction damper 10-1 to the fourth friction damper 10-4, and the constant friction damper 10-5 is also added. By adopting the friction plates used in the first friction damper 10-1 to the fourth friction damper 10-4, the load width P1 can be set larger than the load width P2.

  Since the load width P1 can be increased in this manner, absorption of vibration energy is not started with a small load, and absorption of vibration energy is started when a large load is applied. For example, it is possible to efficiently absorb vibrations generated from a middle-scale or larger earthquake to a large-scale earthquake.

  FIG. 35 is a side view of the friction damper unit ″ according to the second embodiment. In the second embodiment, as shown in FIG. 35, the arrangement of the friction damper units is different from that of the first embodiment described above. Further, portions different from those of the first embodiment are denoted by “″” (two dashes). The third friction damper 10-3 and the fourth friction damper 10-4 corresponding to the reference numerals in parentheses are the back surfaces of the first friction damper 10-1 and the second friction damper 10-2, respectively, in FIG. Is present.

  In the first embodiment, the constant friction damper 10-5 is provided only on the web 20a '. However, as shown in FIG. 35, the constant friction damper 10-5 may be provided on the flange 20b ". Further, although the constant friction damper 10-5 is provided on the right side of the paper surface in the flange 20b 'of FIG. 35, the constant friction damper 10-5 may be provided on the left side of the paper surface.

  As described above, in the constant friction damper 10-5, a through hole is formed in the splice plate 30 '', and a high-strength bolt 162 is inserted into the through hole. Therefore, regardless of the position of the constant friction damper 10-5, if the H-shaped steel 20 "and the splice plate 30" move relative to each other, a constant friction force always acts.

  From such a principle, for example, the web 20a ″ may be provided with a constant friction damper 10-5 and a plurality of friction dampers 10-1 to 10-4, and the flange 20b ″ may be provided with a constant friction damper. . That is, the constant friction damper 10-5 and the plurality of friction dampers 10-1 to 10-4 can be provided at any position.

  Also by doing in this way, the frictional force can be changed step by step, and an appropriate frictional force can be generated according to the load. Further, since the constant friction damper 10-5 is also provided, the load width P1 until the absorption of vibration energy is started can be set large.

  Next, a friction damper unit applied to a stud type as a third embodiment will be described. The first embodiment and the second embodiment have been described for the so-called brace type, but can be applied to the so-called stud type.

  FIG. 36 is a perspective view of the friction damper unit 1 ″ ″ applied to the stud type. FIG. 37 is a front view of the friction damper unit 1 ″ ″ applied to the stud type. FIG. 38 is a simplified cross-sectional view of a friction damper unit applied to a stud type.

  In FIGS. 36 to 38, “″” (three dashes) are added to the reference numerals corresponding to the above-described embodiments. At this time, the member from the upper part of the stud to which reference numeral 20 ″ ″ is attached corresponds to the second press contact plate. Further, the member from the lower part of the stud to which reference numeral 30 ″ ″ is attached corresponds to the first pressure contact plate. Further, the pressing member denoted by reference numeral 166 ″ ″ corresponds to a third pressing plate. In these drawings, reference numeral 140 is assigned to members from the lower part of the studs.

  Even in such a configuration, the frictional force can be changed stepwise by the first friction damper 10-1 to the third friction damper 10-3, and an appropriate frictional force can be generated according to the load. Further, since the constant friction damper 10-5 is also provided, the load width P1 until the absorption of vibration energy is started can be set large.

  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.

1 Friction damper unit (damping structure),
10-1 1st friction damper, 10-2 2nd friction damper,
10-3 3rd friction damper, 10-4 4th friction damper,
10-5 constant friction damper,
12-1 1st friction plate, 12-2 2nd friction plate,
12-3 3rd friction plate, 12-4 4th friction plate, 12-5 5th friction plate,
20 H type steel (second press contact plate),
20a web, 20b flange, 20a ′ web (fifth press contact plate),
21a long hole (second through hole), 21b long hole (second through hole),
21c long hole (second through hole), 21d long hole (second through hole), 21z (fifth through hole),
30 splice plate (first pressure plate, fourth pressure plate),
31 Splice plate slot (first through hole),
32 Sliding plate (sliding plate),
161 Belleville spring laminate (member that generates pressure contact force),
162 high strength bolt (bolt member),
163 nut, 164 washer, 165 bush,
166 Pressure contact member (third pressure contact plate)

Claims (10)

A plurality of friction dampers are disposed between a pair of members that move relative to each other in a predetermined direction in a building frame, and the friction dampers suppress the relative movement by the frictional force between the pressure plates that slide with the relative movement. Is a vibration control structure that controls vibration in conjunction with each other,
The friction damper is
A first pressure contact plate provided on one member of the pair of members;
The second pressure contact plate provided on the other member of the pair of members;
A third press contact plate slidably pressed with the first press contact plate or the second press contact plate;
With
The first pressure contact plate includes a first through hole that is long in the predetermined direction, and is capable of sliding the first movement amount.
The second pressure contact plate includes a second through hole that is shorter than the first through hole, and allows the second movement amount to slide.
The third pressure contact plate includes a third through hole,
A bolt member provided through the first through hole, the second through hole, and the third through hole;
A plurality of the friction dampers, the lengths of the second through holes in the predetermined direction are changed stepwise to make the second movement amount stepwise, and the plurality of friction dampers slide stepwise;
And a constant friction generating member that generates a constant friction force when the relative movement is performed. The vibration damping structure according to claim 1,
A vibration damping structure, comprising: a pipe member that is provided through the first through hole, the second through hole, and the third through hole while the bolt member is inserted inside. The vibration damping structure according to claim 1 or 2,
A vibration damping structure, wherein the first pressure contact plate is sandwiched between the second pressure contact plate and the third pressure contact plate. A vibration damping structure according to any one of claims 1 to 3,
The second pressure-contact plate is at least one of an H-shaped steel web and a flange. A vibration damping structure according to any one of claims 1 to 4,
In the friction damper and the constant friction generating member, the member that generates the pressure contact force is a disc spring. A vibration damping structure according to any one of claims 1 to 5,
A friction plate sandwiched between the first pressure contact plate and the third pressure contact plate;
A friction plate sandwiched between the first pressure contact plate and the second pressure contact plate;
A sliding plate fixedly provided on one surface and the other surface of the first pressure contact plate and in contact with the friction plate;
A vibration control structure characterized by comprising: A vibration damping structure according to any one of claims 1 to 5,
The constant friction generating member is
A fourth pressure contact plate provided on the one member;
A fifth pressure contact plate provided on the other member;
With
The fourth pressure contact plate includes a fourth through hole,
The fifth pressure contact plate includes a fifth through hole that is long in the predetermined direction,
A vibration damping structure comprising a bolt member provided through the fourth through hole and the fifth through hole. A vibration damping structure according to claim 7,
A friction plate sandwiched between the fourth press contact plate and the fifth press contact plate;
A sliding plate fixedly provided on a surface of the fifth pressure contact plate and in contact with the friction plate;
A vibration control structure characterized by comprising: A vibration damping structure according to any one of claims 1 to 5,
The constant friction generating member is
A fourth through hole provided in the first pressure contact plate;
A fifth through hole provided in the second pressure contact plate, the fifth through hole being long in the predetermined direction;
A vibration damping structure comprising a bolt member provided through the fourth through hole and the fifth through hole. A vibration damping structure according to claim 9,
In the constant friction generating member,
A friction plate sandwiched between the first pressure contact plate and the second pressure contact plate;
A sliding plate fixedly provided on a surface of the first pressure contact plate and in contact with the friction plate;
A vibration control structure characterized by comprising: