JP7344835B2 - Vibration damping device installed in the column-beam frame structure - Google Patents

Description

The present disclosure relates to a vibration damping device installed in a column-beam frame structure and including a tie rod and a damper.

A brace is an example of an earthquake-resistant member installed in a column-beam frame structure. A pair of braces are provided on diagonal lines of the column-beam frame structure so as to intersect with each other. During an earthquake, when a beam on an upper layer vibrates in the direction of beam extension relative to a beam on a lower layer, one brace receives a tensile force while the other brace receives a compressive force while shaking in one direction. While the brace is swaying in the other direction of extension, one brace receives a compressive force and the other brace receives a tensile force. If the brace is designed in tension, the tensile force predominantly provides the seismic strength to the column-beam frame structure. In this case, the brace cannot contribute to improving seismic strength while being subjected to compressive force. On the other hand, if the brace is designed using a buckling restraint brace, etc., the compressive force can contribute to improving seismic strength; It was necessary to design a strong mounting member that would have sufficient rigidity and strength.

For such a brace structure, a vibration damping device 1 as shown in FIG. 5 is an example of a device that has not only an earthquake resistance force but also a damping force without compressive force acting on the brace (Patent Document 1 ). The vibration damping device 1 includes a parallel member 3 (seesaw member) rotatably supported by a beam 2, a pair of dampers 4 that connect the beam 2 and the parallel member 3, and a pair of dampers 4 that cross each other and connect the parallel member 3 at one end. The first brace 5 and the second brace 6 (tie rods) are rotatably supported at one end of the beam 2 and rotatably supported at the other end of the other beam 2 . The first brace 5 includes a cross turnbuckle 7, and the second brace 6 passes through a through hole provided in the cross turnbuckle 7.

Assuming that the parallel member 3 is not supported by the beam 2 and there is no pair of dampers 4, the horizontal center of the parallel member 3 moves horizontally but does not move vertically (approximate linear motion, non-linear motion). (See Patent Document 1). The vibration damping device 1 satisfies approximately linear motion by providing the axis of rotation of the parallel member 3 between the beam 2 and the parallel member. Further, in the vibration damping device 1, a space between the parallel member 3 and the beam 2 is used as an installation space for a pair of dampers 4.

During an earthquake, when one of the first and second braces 5 and 6 expands due to a tensile force, one end of the parallel member 3 is pulled up, and the other end of the parallel member 3 is lowered and the first and second braces 5 and 6 are extended. The other end is pulled down. The displacement of the other brace in the direction of shortening caused by the shortening of the diagonal of the column-beam frame structure is absorbed by this displacement of the parallel member, so the other brace receives almost no compressive force.

Patent No. 5515100

Hiroshi Tagawa et al. “Vibration damping structure with U-shaped damper based on approximate linear motion mechanism”, Architectural Institute of Japan Structural Engineering Transactions, Vol. 75, No. 648, pp. 443-451, February 2010.

In the damping device 1 shown in FIG. 5, a special turnbuckle (cross turnbuckle 7) having a through hole for inserting the second brace 6 into the first brace 5 is used. The cross turn buckle 7 having a through hole through which a member with a diameter of up to 90 mm can be inserted exists as a standard product. However, the cross turn buckle 7 having a through hole through which a member having a diameter larger than that is inserted is a custom-made product, which causes an increase in cost. Furthermore, it is difficult to rotate such a huge cross turnbuckle 7. Furthermore, since the second brace 6 passes through the center of the cross turn buckle 7, it is difficult to ensure construction accuracy before and after applying tensile force to the first brace 5. Further, when the cross turn buckle 7 and the second brace 6 passing through it collide with each other due to the influence of wind or the like, the collision sound becomes noise.

In addition, in the device described in Cited Document 1, in order to increase the displacement of the damper 4, it is necessary to increase the length of the parallel member 3 in the extending direction, and if the length of the parallel member 3 is extended in the extending direction, it will fit. was bad. Further, the parallel member 3 is required to have high rigidity and proof strength since a large force is applied to the connection portion of the damper 4, the braces 5 and 6, and the support portion from the beam.

In view of these circumstances, the present invention provides a vibration damping device that is installed in a column-beam frame structure, which reduces costs, makes it easy to ensure construction accuracy, and suppresses noise generation. The purpose is to provide. An embodiment of the present invention aims to provide a vibration damping device that can easily ensure the rigidity and proof strength of its members. An embodiment of the present invention aims to provide a vibration damping device that fits well.

An embodiment of the present invention includes a first member (13) that constitutes one of a column and a beam and extends in a first direction; and a first member (13) that constitutes one of the column and beam and extends in the first direction. and a second member (14) disposed in one of the second directions orthogonal to the first direction with respect to the first member. A device (10, 30, 40, 50) that can be regarded as a rigid body against earthquake forces applied in the first direction and the second direction, and has a length in the first direction and a length in the second direction. a seesaw member (15, 41) arranged in the one direction in the second direction with respect to the first member; a pin joint body (16, 42) rotatably joined around a first axis line part (20) parallel to one direction and a third direction orthogonal to the second direction; A pair of first dampers (17) are connected to the seesaw member (15, 41) and the first member (13) in one and the other direction in the first direction, and one end thereof is connected to the first axis portion (20). ) is connected to the seesaw member (15, 41) so as to be rotatable about a second axis part (22) located in the one of the second directions and parallel to the third direction, and the other end part is connected to the seesaw member (15, 41). A first tie rod () rotatably joined to a corner on one end side of the second member (14) in the column-beam frame structure (11, 31) about a third axis (24) parallel to the third direction; 18), one end of which is rotatably joined to the seesaw member (15, 41) around the second axis (22), and the other end of which is connected to the second part of the column-beam frame (11, 31). The second tie rod (19) is rotatably joined to the corner of the other end of the member (14) about a fourth axis (25) parallel to the third direction.

According to this configuration, the first tie rod and the second tie rod are rotatably joined to the seesaw member at the common second axis, and there is no need to use a special member such as a cross turn buckle, which reduces costs. It is easy to ensure construction accuracy, and noise generation is suppressed.

In an embodiment of the present invention, in the above configuration, the seesaw member (15) includes a frame member or a panel member having a triangular shape when viewed from the third direction, and the second axis portion (22) is The first tie rod (18) and the second tie rod (19) are provided near one vertex of the triangular shape, and the first tie rod (18) and the second tie rod (19) in a non-earthquake state extend from the one vertex of the triangular shape of the seesaw member (15). It is characterized by being located on an extension of the side.

According to this configuration, since the seesaw member has a triangular shape, the rigidity and proof strength of the seesaw member can be easily ensured at low cost, and the seesaw member and the first and second tie rods can be moved in an approximate linear motion. It is possible to create a structure that is preserved in terms of

In an embodiment of the present invention, in the above-described first configuration, the first axis portion (20) is closer to the second axis than the connecting portion where the first damper (17) is connected to the seesaw member (41). It is characterized by being located in said one of the directions.

According to this configuration, the distance between the first axis part and the second axis part becomes shorter, the amount of displacement of the first damper increases, and the amount of energy absorbed by the first damper increases, so that the damping device It will work effectively.

An embodiment of the present invention is characterized in that, in the above configuration, the seesaw member (41) has an inverted Y shape when viewed from the third direction.

According to this configuration, since the inverted Y shape is concave inward, the space of the concave part can be effectively utilized. For example, the concave part is used for introducing tensile force to the first and second tie rods. This will be the installation space for the jack.

In an embodiment of the present invention, in any of the above configurations, the first member (13) extends toward the one side in the second direction, and the extending end is longer than the first damper (17). A frame member including a pair of support members (51a) located on the one side in the second direction, and a fixing member (51b) fixed to the extending end portions of the pair of support members (51a). 51) and the first damper (17) are arranged on the seesaw in one and the other of the first direction from the first axis part (20) in order to apply a damping force from the opposite side of the second direction. It is characterized by further comprising a pair of second dampers (52) connected to the member (15) and the fixing member (51b).

According to this configuration, the energy absorption performance can be increased by the second damper.

In an embodiment of the present invention, in any of the above configurations, the column-beam frame structure (31) is provided between the first member (13) and the second member (14) of the column or beam. 1 comprising one or more members (32) constituting the one, and/or constituting the other of the column and beam between the third axis section (24) and the fourth axis section (25); It is characterized by including the above member (12).

According to this configuration, the vibration damping device can be installed across the pillar and/or the beam.

According to the present invention, it is a vibration damping device installed in a column-beam frame structure, which reduces costs, makes it easy to ensure construction accuracy, suppresses noise generation, and makes it easy to ensure the rigidity and strength of members. A vibration damping device can be provided.

Front view of the vibration damping device according to the first embodiment A front view of a vibration damping device according to a modification of the first embodiment Front view of the vibration damping device according to the second embodiment Front view of the vibration damping device according to the third embodiment Front view of a vibration damping device according to conventional technology

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

FIG. 1 shows a vibration damping device 10 according to a first embodiment. The vibration damping device 10 is installed in a column-beam frame structure 11 of a building. The column-beam frame structure 11 includes a pair of column members 12 that extend in the vertical direction and are adjacent to each other, a first member 13 that is a beam member horizontally spanned between the pair of column members 12, and a first member 13 that is a beam member that extends horizontally between the pair of column members 12. A second member 14, which is a beam member horizontally spanned between a pair of column members 12, is provided in an upper layer than the member 13. The column-beam frame structure 11 is a steel structure, a concrete structure such as reinforced concrete, a wooden structure, or a composite structure thereof. The illustrated column-beam frame structure 11 is a steel structure in which a pair of column members 12 and first and second members 13 and 14 are made of H-beam steel.

The vibration damping device 10 includes a seesaw member 15, a pin joint 16 that joins the seesaw member 15 and the first member 13 to rotatably support the seesaw member 15 with respect to the first member 13, and a first member. 13 and both ends of the seesaw member 15, and a pair of first dampers 17 that are pin-joined to the seesaw member 15 at one end, respectively, and a pair of first dampers 17 that connect the column member 12 and the second damper in the column-beam frame structure 11 at the other end. A first tie rod 18 and a second tie rod 19 are provided which are pin-joined to corners of opposing sides of the member 14.

The seesaw member 15 is composed of a triangular frame member in which three elongated members are rigidly connected at their ends, and the plane defined by the triangular frame is parallel to the structural plane of the column-beam frame structure 11. A steel material such as a section steel may be used as the long material. The seesaw member 15 can be regarded as a rigid body against earthquake forces applied in the extending direction of the first member 13 and the second member 14 as well as in the vertical direction, and the length of the first member 13 and the second member 14 in the extending direction is It may be formed of other shapes and/or other materials as long as it has a length and a length in the vertical direction. For example, it may be formed of a triangular steel panel material when viewed from the front. The triangular seesaw member 15 is preferably an isosceles triangle, with its base horizontally arranged and a pair of equal sides approaching each other upward from both ends of the base.

The pin joint 16 includes a lower part 16a fixed to the first member 13 and an upper part 16b fixed to the center of the bottom of the seesaw member 15, and the upper part 16b is connected to the lower part 16a on the structural surface of the column-beam frame structure 11. It is rotatably supported around the orthogonal first axis portion 20 . Therefore, the seesaw member 15 is rotatable around the first axis portion 20 with respect to the first member 13 . The pin joint 16 may be constituted by, for example, a clevis.

The pair of first dampers 17 are arranged to sandwich the pin assembly 16, are fixed to the first member 13 at their lower ends, and are attached at their upper ends near opposing ends of the bottom of the seesaw member 15. , that is, it is fixed near the vertex formed by the base and equilateral sides of the triangle. The first damper 17 is a vibration damper, and is, for example, a hysteresis type damper such as a steel damper, an oil damper, a viscoelastic damper, or the like. The pair of first dampers 17 may be the same or different. The pair of first dampers 17 apply damping force in the vertical direction to both left and right ends of the seesaw member 15 .

The first tie rod 18 and the second tie rod 19 include steel rods having fork-shaped ends so that they can be pin-joined to other members. Note that the first tie rod 18 and/or the second tie rod 19 are not composed of one steel rod, but are composed of two steel bars whose distal ends are formed in a fork shape, It may also include a turnbuckle 21 that connects the ends of two steel bars that are close to each other (in FIG. 1, the first tie rod 18 includes the turnbuckle 21, and the second tie rod 19 includes a ). One end of the first tie rod 18 and the second tie rod 19 and a portion near the apex formed by two equal sides of the seesaw member 15 rotate around a second axis portion 22 perpendicular to the structural surface of the column-beam frame structure 11. Possibly joined to each other. The other end of the first tie rod 18 is attached to the column-beam frame structure 11 via a gusset plate 23 at the corner of one of the pair of column members 12 and one end of the second member 14 (the left end in FIG. 1). It is joined to be rotatable around a third axis line portion 24 perpendicular to the structural surface. The other end of the second tie rod 19 is connected to the column-beam frame structure 11 through a gusset plate 23 at the corner between the other of the pair of column members 12 and the other end of the second member 14 (the right end in FIG. 1). It is joined so as to be rotatable around a fourth axis line portion 25 perpendicular to the structural plane.

The second axis portion 22 is preferably aligned with the first axis portion 20 in the vertical direction, and the vertical position of the second axis portion 22 is from the center between the first member 13 and the second member 14. is also close to the first member 13 and above the first axis portion 20 . It is preferable that the lengths of the first tie rod 18 and the second tie rod 19 are substantially equal to each other, and the angles of the first tie rod 18 and the second tie rod 19 with respect to the second member 14 are substantially equal to each other. In non-earthquake situations, it is preferable that the first tie rod 18 and the second tie rod 19 be arranged on an extension line of a member constituting a side portion extending from the apex of the triangular seesaw member 15 including the second axis line portion 22. The gusset plate 23 is fixed to the column member 12, the first member 13, and the second member 14 by welding or the like. It is preferable to introduce a tensile force into both the first tie rod 18 and the second tie rod 19 in advance so that the tensile force is applied to both the first tie rod 18 and the second tie rod 19 in a non-earthquake.

The effects of the vibration damping device 10 when the second member 14 is displaced laterally with respect to the first member 13 during an earthquake will be explained.

When the second member 14 receives an earthquake force (inertia force) directed to the right in FIG. It moves while maintaining a state parallel to the member 13, and the column-beam frame structure 11 deforms into a parallelogram. In the deformed column-beam frame structure 11, the diagonal line connecting the upper right corner and the lower left corner becomes longer, and the diagonal line connecting the upper left corner and the lower right corner becomes shorter than before the deformation. Since the diagonal line connecting the upper right corner and the lower left corner of the column-beam frame 11 becomes longer, a tensile force is generated in the second tie rod 19, and this tensile force acts on the column-beam frame 11 in a direction that resists the seismic force. Furthermore, the seesaw member 15 rotates clockwise around the first axis portion 20 due to the tensile force generated in the second tie rod 19 . This rotation increases the distance between the second axis section 22 and the third axis section 24 to which both ends of the first tie rod 18 are joined. The amount of increase in the distance between the second axis section 22 and the third axis section 24 due to this rotation compresses the first tie rod 18 due to the shortening of the diagonal line connecting the upper left corner and the lower right corner of the column-beam frame structure 11. Since the length of the first tie rod 18 is approximately equal to the amount of decrease in the length in the direction of the earthquake, the length of the first tie rod 18 is substantially the same as the length during a non-earthquake, and the application of compressive force to the first tie rod 18 is suppressed.

Subsequently, when the vibration direction of the earthquake changes and the second member 14 receives an earthquake force directed to the left in FIG. While returning, a tensile force is generated in the first tie rod 18 due to the damping force from the first damper 17, and this tensile force acts on the column-beam frame structure 11 in a direction that resists the seismic force.

When the column member 12 tilts to the left, in the deformed column-beam frame structure 11, the diagonal line connecting the upper left corner and the lower right corner becomes longer and the diagonal line connecting the upper right corner and the lower left corner becomes shorter than before the deformation. Since the diagonal line connecting the upper left corner and the lower right corner of the column-beam frame 11 becomes longer, a tensile force is generated in the first tie rod 18, and this tensile force acts on the column-beam frame 11 in a direction that resists the seismic force. Further, the seesaw member 15 rotates counterclockwise around the first axis portion 20 due to the tensile force generated in the first tie rod 18 . This rotation increases the distance between the second axis section 22 and the fourth axis section 25 to which both ends of the second tie rod 19 are joined. The amount of increase in the distance between the second axis section 22 and the fourth axis section 25 due to this rotation compresses the second tie rod 19 due to the shortening of the diagonal line connecting the upper right corner and the lower left corner of the column-beam frame structure 11. Therefore, the length of the second tie rod 19 is substantially the same as the length in a non-earthquake state, and the application of compressive force to the second tie rod 19 is suppressed.

Subsequently, when the vibration direction of the earthquake changes and the second member 14 receives an earthquake force directed to the right in FIG. While returning, a tensile force is generated in the second tie rod 19 due to the damping force from the first damper 17, and this tensile force acts on the column-beam frame structure 11 in a direction that resists the seismic force.

The vibration damping device 10 repeats the above-described movements during an earthquake.

Compared to the conventional vibration damping device 1 shown in FIG. 5, the vibration damping device 10 according to the first embodiment shown in FIG. This prevents the first tie rod 18 and the second tie rod 19 from colliding with each other, thereby preventing noise. In addition, since the first tie rod 18 and the second tie rod 19 are rotatably joined at their ends, both the first tie rod 18 and the second tie rod 19 are pre-tensioned so that they will receive a tensile force in a non-earthquake. When introducing force, it is easy to ensure construction accuracy before and after introducing tensile force. When the first tie rod 18 and/or the second tie rod 19 includes a turnbuckle 21, the turnbuckle 21 is thinner than the cross turnbuckle 7, so by rotating the turnbuckle 21, the first tie rod 18 and/or The length and/or tension of the second tie rod 19 can be easily adjusted.

Since the seesaw member 15 includes a triangular frame material or panel material when viewed from a direction perpendicular to the structural surface of the column-beam frame structure 11, it has the necessary rigidity and resistance in the direction parallel to the structural surface of the column-beam frame structure 11. can be easily secured. In addition, since the first tie rod 18 and the second tie rod 19 in a non-earthquake state extend on the extension line of the side extending from the apex including the second axis line part 22 of the triangular seesaw member 15, the approximate linear motion is approximately will be saved.

Since the pair of first dampers 17 apply force to the seesaw member 15 in a direction that resists rotation, the pair of first dampers 17 apply pressure to the column via the seesaw member 15 and the first tie rod 18 and second tie rod 19. A damping force is applied to the beam frame structure 11.

With reference to FIG. 2, a vibration damping device 30 according to a modification of the first embodiment will be described. The vibration damping device 30 according to the modified example is attached to the column-beam frame structure 31 across the columns and beams. The column-beam frame structure 31 includes a third member 32 that constitutes a beam between the first member 13 and the second member 14 , and the column member 12 between the third axis section 24 and the fourth axis section 25 . include. There may be a plurality of pillar members 12 between the third member 32, the third axis section 24, and the fourth axis section 25. Further, one of the third member 32 and the column member 12 between the third axis section 24 and the fourth axis section 25 may not exist. Since the first tie rod 18 and the second tie rod 19 can be constructed of thin members since the application of compressive force is suppressed, the deformation of the section spanning the column and/or beam can be damped by one vibration damping device 30. As for the structure, it is possible to prevent the first tie rod 18 and the second tie rod 19 from becoming excessively thick.

With reference to FIG. 3, a vibration damping device 40 according to a second embodiment will be described. Components that are common to those in the first embodiment are given the same reference numerals and descriptions thereof will be omitted. The vibration damping device 40 according to the second embodiment is different from the first embodiment in the shapes of the seesaw member 41 and the pin assembly 42.

The seesaw member 41 has an inverted Y shape when viewed from a direction perpendicular to the structural surface of the column-beam frame structure 11, and has one end portions of three long steel members such as shaped steel welded or fastened together. It is formed by rigidly joining by fastening or the like (not shown).

The pin assembly 42 includes a lower part 42a fixed to the first member 13, and an upper part 42b fixed to the bent part of the inverted Y shape at the center of the lower side of the seesaw member 41 in the left-right direction. It is rotatably supported by the lower part 42 a around the first axis 20 that is perpendicular to the structural surface of the column-beam frame structure 11 . The pin joint body 42 may be constituted by, for example, a clevis. The first axis portion 20 is located above the connection portion between the seesaw member 41 and the first damper 17.

The seesaw member 41 can be regarded as a rigid body against earthquake forces applied in the extending direction of the first member 13 and the second member 14 and in the vertical direction, and the length of the first member 13 and the second member 14 in the extending direction is If the shape has a length and a length in the vertical direction and allows the first axis portion 20 to be positioned above the mutual connection portion of the seesaw member 41 and the first damper 17, it is an inverted Y shape. It may have a shape other than the above shape. For example, the seesaw member 41 may have a shape that is modified from the shape of the seesaw member 15 of the first embodiment so that the center of the lower side is concave upward.

By positioning the first axis portion 20 above the connection portion between the seesaw member 41 and the first damper 17, the distance between the first axis portion 20 and the second axis portion 22 becomes shorter. If the amount of displacement of the second axis section 22 during an earthquake is the same, the shorter the distance between the first axis section 20 and the second axis section 22, the greater the rotation angle of the seesaw member 41. Therefore, the amount of displacement of the first damper 17 can be increased compared to the first embodiment without increasing the length of the seesaw member 41 in the left-right direction. Therefore, the energy absorption efficiency of the vibration damping device 40 is improved.

The inverted Y-shaped seesaw member 41 has an inverted Y shape that is concave inward compared to the triangular seesaw member 15 of the first embodiment, so that the space of the concave portion can be used effectively, for example. This space can be used as an installation space for a jack or the like for introducing tensile force into the first tie rod 18 and the second tie rod 19.

A vibration damping device 50 according to a third embodiment will be described with reference to FIG. 4. Components that are common to those in the first embodiment are given the same reference numerals and descriptions thereof will be omitted. The vibration damping device 50 according to the third embodiment includes a frame member 51 fixed to the first member 13 and a damping force applied to the seesaw member 15 from the side opposite to the first damper 17 by being fixed to the frame member 51. This embodiment differs from the first embodiment in that it includes an additional pair of second dampers 52.

The frame member 51 extends upward from the first member 13, and includes a pair of strut members 51a whose extending ends are located above the first damper 17, and a pair of strut members 51a at both ends. It includes a fixing member 51b fixed to the extending end.

The pair of second dampers 52 are arranged on the seesaw member 15 and the fixing member 51b on the left and right sides of the first axis section 20 in order to apply a damping force from the side opposite to the first damper 17 in the vertical direction. It is connected. The second damper 52 is a vibration damper, and is, for example, a hysteretic damper such as a steel damper, an oil damper, a viscoelastic damper, or the like. The pair of second dampers 52 may be the same or different, and may be the same or different from the first damper 17.

By providing the second damper 52, the amount of energy absorbed by the vibration damping device can be increased.

Although the description of the specific embodiments has been completed above, the present invention is not limited to the above-mentioned embodiments and can be widely modified and implemented. The second member may be a beam member installed below the first member, and the first member and the second member may be pillar members. The column-beam frame structure according to the modification of the first embodiment may be applied to the second or third embodiment, and the seesaw member of the second embodiment may be applied to the third embodiment.

10, 30, 40, 50: Vibration damping device 11, 31: Column beam frame structure 12: Column member 13: First member 14: Second member 15, 41: Seesaw member 16, 42: Pin joint body 17: First Damper 18: First tie rod 19: Second tie rod 20: First axis section 22: Second axis section 24: Third axis section 25: Fourth axis section 32: Third member (other members)
51: Frame member 51a: Support member 51b: Fixed member 52: Second damper

Claims (6)

a first member that constitutes one of a pillar and a beam and extends in a first direction; and a first member that constitutes one of the pillar and beam and extends in the first direction, and a A vibration damping device installed in a column-beam frame structure including a second member disposed on one side of a second direction orthogonal to the first direction,
It can be regarded as a rigid body against earthquake forces applied in the first direction and the second direction, has a length in the first direction and a length in the second direction, and has a length in the first direction and a length in the second direction. a seesaw member disposed in one of the two directions;
a pin assembly that rotatably joins the seesaw member to the first member around a first axis parallel to a third direction orthogonal to the first direction and the second direction;
a pair of first dampers connected to the seesaw member and the first member in one and the other of the first direction relative to the first axis;
One end is located on the one side of the second direction than the first axis and is rotatably joined to the seesaw member about a second axis parallel to the third direction, and the other end is connected to the column. a first tie rod rotatably joined to a corner on one end side of the second member in the beam frame structure about a third axis parallel to the third direction;
One end is rotatably joined to the seesaw member around the second axis, and the other end is attached to a corner of the column-beam frame structure on the other end side of the second member parallel to the third direction. A vibration damping device comprising a second tie rod rotatably joined around four axes. The seesaw member includes a frame member or a panel member having a triangular shape when viewed from the third direction,
The second axis portion is provided near one vertex of the triangular shape,
The damping device according to claim 1, wherein the first tie rod and the second tie rod during a non-earthquake are located on an extension line of a side extending from the one vertex of the triangular shape of the seesaw member. Device. The vibration damping device according to claim 1, wherein the first axis portion is located on the one side in the second direction from a connecting portion where the first damper is connected to the seesaw member. The vibration damping device according to claim 3, wherein the seesaw member has an inverted Y shape when viewed from the third direction. a pair of strut members extending from the first member toward the one in the second direction and having an extending end located in the one in the second direction relative to the first damper; a frame member including a fixing member fixed to the extending end of the column member;
The first damper is a pair connected to the seesaw member and the fixing member at one and the other side in the first direction from the first axis portion in order to apply a damping force from the opposite side to the second direction. The vibration damping device according to any one of claims 1 to 4, further comprising a second damper. The column-beam frame structure includes one or more members constituting either the column or the beam between the first member and the second member, and/or the third axis portion and the third axis The vibration damping device according to any one of claims 1 to 5, further comprising one or more members constituting the other of the column and the beam between the four axis portions.

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