JP6429750B2 - Damping device and damping structure - Google Patents

Description

  The present invention relates to a vibration damping device and a vibration damping structure in a building structure.

  When an external force is applied due to a shaking of an earthquake, the building structure is an earthquake-resistant structure that can withstand the external force with the strength of the structure, a seismic isolation structure that isolates the main structure from the ground, and the applied external force is reduced By providing a vibration control structure, etc., the main structure itself can be avoided. Among them, the vibration control structure is being spread recently because it can be applied to many building structures regardless of site conditions and building conditions and is cost-effective. In addition, since the vibration control structure absorbs vibration energy by using the initial vibration of the earthquake, the vibration width at the peak of the vibration can be greatly reduced compared to the earthquake resistant structure, and the vibration time is also shortened. Contributes to improved safety.

  Conventionally, hydraulic dampers, viscous bodies, friction devices, metal devices, and the like are known as devices for imparting a damping structure to a building structure. For example, Patent Literature 1 discloses a damping structure using an oil damper, and Patent Literature 2 discloses a damping structure using a friction device. Further, as shown in Patent Document 3, a damping structure having a damping brace structure in a rectangular structure is also known. However, these structures require a large-scale structure and the construction cost is high.Hydraulic dampers and viscous bodies have speed dependency, so there is a variation in the stability of the damping performance against various earthquake vibrations. Maintenance occurs in order to maintain the vibration control performance due to aging and deterioration. Moreover, it is difficult for the friction device to permanently maintain an appropriate pressure and a stable friction coefficient according to the building structure.

  In metal equipment, vibration energy is consumed by the energy required to repeatedly deform the metal material. Therefore, the vibration control performance is more stable and reliable than the above vibration control devices. Also good. For example, Patent Document 4 discloses the use of low yield point steel as a damping material as an oblique material (brace material) having a column beam structure. However, in such a vibration damping structure, since the entire diagonal member is plastically deformed, the diagonal member itself buckles or cuts due to a large earthquake or the like, which causes fatal damage to the vibration damping structure.

  Patent Document 5 discloses a vibration damping structure in which a metal frame-like device having a shape similar to a rectangular structure of a column beam is inserted in the middle of an oblique member of a column beam structure. This vibration damping structure is composed of a rectangular structure, a rigid frame similar to the rectangular structure, and a diagonal member that connects the corners of the rectangular structure and the corners of the rigid frame. Is 0.02 to 0.3.

  However, as will be described later, the rigidity of this type of damping structure is inversely proportional to the cube of the reduction ratio of the size of the frame-like device with respect to the size of the rectangular structure. Therefore, the smaller the frame-like device, the higher the rigidity. However, if it is too small, there is a problem that the load per unit cross-sectional area of the frame-shaped device increases and the processing becomes difficult. In addition, when the frame-shaped device breaks due to a large earthquake or the like, there is a risk that the vibration control performance may be lost at once.

JP 11-022238 A US Pat. No. 5,819,484 Japanese Patent Laid-Open No. 10-317711 JP-A-10-306615 JP 2010-095901 A

  Therefore, in the present invention, a large-scale structure is not required, the construction cost is low, the vibration control performance is stable and reliable regardless of the characteristics of the earthquake and the building structure, and maintenance is unnecessary and good durability. A damping device and a damping structure are provided. And in the present invention, even if it receives a large shake, the diagonal material itself does not buckle and break, and even if a part of the vibration damping device is broken, the vibration damping performance can be lost at once. In addition, the present invention provides a vibration damping device and a vibration damping structure having high rigidity and high workability.

In order to solve the above problems, a vibration damping device for damping a building structure including a rectangular structure material via a diagonal member arranged on a diagonal line of the rectangular structure material, the shape being similar to that of the rectangular structure material An outer frame having a shape similar to that of a rectangular structural material, each side being shorter than each side of the outer frame and parallel or perpendicular to each other, and extending diagonally from the outer frame from each corner. And a joint for connecting to the diagonal member, and only each corner of the outer frame is joined to the corner of the inner frame, the center of the inner frame coincides with the center of the outer frame, and each corner of the inner frame Is provided with a damping device characterized by being connected to each corresponding corner of the outer frame via a straight member .
According to this, by the damping device engaged binding the corner of the corner and the outer frame is less than the frame of the outer frame is connected to the diagonal members through the joint coincides with the diagonal member axis, big shake The diagonal of the shortened side of the frame is large even if it is subjected to bending, so that the diagonal material itself does not buckle and break, and the combination of the outer frame and the inner frame provides high rigidity but good workability. By combining the outer frame and the inner frame, which can provide a vibration device and the center of the outer frame and the inner frame, which have different reduction ratios with respect to the rectangular structure material, the vibration damping device has a combined strength of the outer frame and the inner frame. Since there are multiple frames that have different rigidity and different stresses in the plastic region, and the amount of deformation that causes fracture such as cracks and breaks in each frame is different, Without being is to be destroyed, it is possible to provide a vibration damping device is not to lose stretch damping performance. Further, by combining a large outer frame and a highly rigid inner frame, it is possible to provide a vibration damping device that has high rigidity but good workability.

  As described above, according to the present invention, the construction cost is low without requiring a large-scale structure, the damping performance is stable and reliable regardless of the characteristics of the earthquake and the building structure, and the maintenance. It is possible to provide a vibration damping device and a vibration damping structure that are unnecessary and have high durability. Further, according to the present invention, even if a large vibration is received, the diagonal member itself is not buckled and broken, and even if a part of the vibration damping device is broken, the vibration damping performance at once. In addition, it is possible to provide a vibration damping device and a vibration damping structure that have high rigidity and high workability.

BRIEF DESCRIPTION OF THE DRAWINGS (A) Front view, (B) Top view, (C) Side view, (D) Perspective view of the vibration damping device of the first embodiment according to the present invention. The front view at the time of attaching the damping device of 1st Example which concerns on this invention to the rectangular structure material. BRIEF DESCRIPTION OF THE DRAWINGS (A) Front view at the time of load of the vibration damping device of 1st Example which concerns on this invention, (B) Front view at the time of a fracture | rupture. The load deformation | transformation curve (horizontal displacement-horizontal load) of the damping device of 1st Example which concerns on this invention. (A) Front view of only outer frame, (B) Front view of only inner frame, (C) Load deformation curve (interlayer displacement angle-horizontal load) of the vibration damping device of the first embodiment according to the present invention. The expansion side diagonal deformation | transformation-shortening side diagonal deformation | transformation figure of the damping device of 1st Example which concerns on this invention. (A) Front view, (B) Plan view, (C) Side view, (D) Perspective view, (E) Plan view of expansion joint of the vibration damping device of the second embodiment according to the present invention. The front view at the time of attaching the damping device of 2nd Example which concerns on this invention to the rectangular structure material. (A) Front view at the time of load, (B) Front view at the time of a fracture | rupture of the damping device of 2nd Example which concerns on this invention. (A) Steel material load deformation curve (horizontal displacement-horizontal load), (B) Aluminum load deformation curve (horizontal displacement-horizontal load) of the vibration damping device of the second embodiment according to the present invention. The expansion side diagonal deformation | transformation-shortening side diagonal deformation | transformation figure of the damping device of 2nd Example which concerns on this invention. (A) front view, (B) plan view of the vibration damping device when the vibration damping device of the first embodiment and the vibration damping device of the second embodiment according to the present invention are combined (third embodiment); C) Side view, (D) Perspective view. BRIEF DESCRIPTION OF THE DRAWINGS (A) Front view and (B) Perspective view of the damping structure when the damping device of the first embodiment and the damping device of the second embodiment according to the present invention are attached (third embodiment). The schematic diagram of the front shape of the axial part in the damping device and damping structure which concern on this invention. (A) Schematic diagram in case of first embodiment of vibration damping device, (B) Schematic diagram in case of second embodiment of vibration damping device, (C) In case of modification of first embodiment of vibration damping device (D) Schematic diagram in the case of a modification of the second embodiment of the damping device, (E) Schematic diagram of the damping structure (in the figure, the damping device of the first embodiment is used), (F ) Comparison of diagonal deformation between shortened side and elongated side.

Embodiments according to the present invention will be described below with reference to the drawings.
The present invention will be described with reference to FIG. This figure is a representation of a rectangular structural material and a vibration damping device with a center line that is an action line of force at each part of the rectangular structural material such as a column and a beam and at each part of the vibration damping device such as an outer frame and an inner frame. is there. The “similar shape” in the present specification means that the center line, which is the action line of force in the outer frame and the inner frame of the vibration damping device, is similar to the column and beam of the rectangular structure material. That is, when the rectangular structural material and the vibration damping device are similar, they do not include the concept of the thickness and thickness of each part of both.

  The vibration damping device 10A shown in FIG. 6A includes one rectangular outer frame 11A, one inner frame 12A smaller than the outer frame 11A and having a similar shape to the outer frame 11A, and the outer frame 11A (in the drawing). And a joint 13A extending outward from each corner OCO on a diagonal line DL (indicated by a dashed line). Each side (center line) constituting the outer frame 11A and each side (center line) constituting the inner frame 12A are rigidly connected or integrally formed with each other, and each corner of the outer frame 11A and the inner frame 12A has rigidity. is there. Each corner ICO of the outer frame 11A is indirectly coupled in the same plane as the corner OCI of the inner frame 12A. That is, each corner ICO of the outer frame 11A is connected to the corner OCI of the inner frame 12A via the linear member 14A. In this example, the corner ICO of the outer frame 11A and the corner OCI of the inner frame 12A are connected by the linear member 14A constituting a straight line, but the present invention is not limited to this, and a linear member that is slightly curved or meandering may be used. .

  The inner frame 12A and the outer frame 11A are in the same plane, and the sides constituting the rectangle of the inner frame 12A are parallel or perpendicular to the sides constituting the rectangle of the outer frame 11A. For example, the vertical side of the inner frame 12A is parallel to the vertical side of the outer frame 11A and is vertical to the horizontal side of the outer frame 11A. Further, the horizontal side of the inner frame 12A is perpendicular to the vertical side of the outer frame 11A, and is parallel to the horizontal side of the outer frame 11A. Note that the inner frame 12A, which is smaller than the outer frame 11A, does not have diagonal materials arranged on the diagonal line DL and connecting the diagonals of the inner frame 12A.

  The vibration damping device 10A shown in this figure (A) is incorporated in a vibration damping structure 100 that forms a part of a building structure (not shown) as shown in this figure (E). The damping structure 100 includes a rectangular structural member 101 including columns 102 and beams 103, an oblique member 104 disposed on the diagonal line DL of the rectangular structural member 101, and an oblique member 104 between the oblique member 104 by a joint 13A. And a connected vibration damping device 10A. Therefore, the vibration damping device 10 </ b> A is a vibration damping device that dampens the building structure including the rectangular structure material 101 via the diagonal material 104 disposed on the diagonal line DL of the rectangular structure material 101.

  More generally, the term “rectangular structural material” refers to two structural materials extending in one direction on one structural surface of a structure and two structural materials extending in a direction perpendicular to these structural materials. When the present invention is applied to the construction surface of a vertical wall, two columns and two beams can be used as in this example. In the present specification, a main application example is a vertical wall surface, but the present invention is not limited thereto. Note that the building structure including the vibration damping structure 100 does not have to be made of a rectangular structure material, and may include a truss structure or a wall structure. Moreover, the rectangular structural material provided in the building structure does not need to be provided with the vibration damping device in all, and may be provided in part. Further, the building structure in the present specification may be any structure such as a wooden building, a steel structure, a reinforced concrete structure.

  The vibration damping device 10 </ b> A includes an outer frame 11 </ b> A having a shape similar to that of the rectangular structure material 101 obtained by reducing the rectangular structure material 101 including the pillar 102 and the beam 103 by a predetermined ratio (α). In the illustrated example, for the convenience of drawing, the dimensional ratio of the outer frame 11A to the rectangular structure material 101 is about α = 0.2, but the present invention is not limited to this. The inner frame 12A is a frame obtained by reducing the rectangular structural member 101 at a ratio (β) smaller than the predetermined ratio (α). That is, each side of the inner frame 12A is shorter than each corresponding side of the outer frame 11A.

  According to the inventor's analysis, it has been found that the rigidity of the outer frame or the inner frame is inversely proportional to the cube of the decreasing ratio of the outer frame or the inner frame to the rectangular structure material. Further, it has been found that the yield strength of the outer frame or the inner frame is inversely proportional to the reduction ratio of the outer frame or the inner frame to the rectangular structure material. Then, the rigidity of the damping structure 100 is inversely proportional to the cube of the reduction ratio of the dimension of the damping device 10A with respect to the dimension of the rectangular structural member 101. Therefore, due to the rigidity of the inner frame 12A reduced by a smaller ratio (β), It will be more greatly affected.

  As a result of repeated simulations of strength calculation, in the vibration damping device having only the inner frame 12A, the most preferable numerical value β = 0.05 as the reduction ratio β of the size of the inner frame 12A of the vibration damping device with respect to the rectangular structural member 101. It is. The upper limit value of the reduction ratio β is β = 0.3 from the result of intensity calculation. The lower limit value of the reduction rate β is 0.02. This lower limit is based on practical constraints rather than theoretically derived numbers. When the height of the pillar 102 of the general rectangular structure material 101 is 3 m, the length of the beam 103 is 2 m, and this is multiplied by a reduction ratio of 0.02, the size of the inner frame 12A is 60 mm in the vertical length, left and right The length is 40 mm. If the size is smaller than this, the load generated in the unit cross-sectional area of the inner frame 12A increases, and machining becomes difficult.

  When the inner frame 12A has a left and right length of 40 mm, for example, when the thickness of the inner frame 12A is 10 mm and the gap with the outer frame 11A is 10 mm in consideration of play for deformation, The lower limit of the left and right length of the frame 11A is 60 mm, and since it is similar, the lower limit of the vertical length is 90 mm. In this case, the reduction rate α of the outer frame 11A with respect to the rectangular structural member 101 is α = 0.03. In the case of this example, there is no clear correlation between the size of the inner frame 12A and the size of the outer frame 11A, but the size of the outer frame 11A is substantially maximum and has a rectangular structure. It is about half the size of the material 101. Therefore, the upper limit value of the reduction rate α of the outer frame 11A can be set to 0.5. Then, the predetermined ratio obtained by reducing the rectangular structure material in the outer frame 11A is α = 0.03 to 0.5, and the rectangular structure material in the inner frame 12A is reduced at a ratio smaller than the predetermined ratio (reduction ratio α). The ratio is β = 0.02 to 0.3.

  As shown in FIG. 5E, the vibration damping structure 100 includes the joint 13A of the vibration damping device 10A and the rectangular center O3 of the vibration damping device 10A so that the rectangular center O1 of the outer frame 11A of the vibration damping device 10A coincides. A vibration damping device 10 </ b> A is provided by connecting to each diagonal material 104 corresponding to each corner ICS of the rectangular structural material 101. That is, in the damping structure 100, the rectangular center O1 of the outer frame 11A of the damping device 10A coincides with the rectangular center O3 of the rectangular structure material 101, and the joint 13A of the damping device 10A is connected to each corner of the rectangular structure material 101. The diagonal member 104 corresponding to the ICS is connected. By connecting the frame-shaped vibration damping device 10A similar to the rectangular structural member 101 in this way, the vibration damping structure 100 can return to its original shape even when the vibration damping device 10A is repeatedly subjected to positive and negative deformations. Therefore, it can have excellent vibration damping performance.

  Further, as shown in the figure (F), in the deformation of the extension side diagonal line (dotted line) and the deformation of the shortened side diagonal line (solid line) in the vibration damping device 10A incorporated in the vibration damping structure 100, It has been found by the inventors' examination and experiment that the deformation of the shortened diagonal line is larger (experimental data will be described later). Interlayer displacement refers to the displacement of the column or the horizontal displacement of the upper beam relative to the lower beam when a horizontal external force is applied to the upper beam of the damping structure, taking the lower beam and the upper beam as layers. The diagonal line on the compression side indicates the diagonal member that is disposed toward the short diagonal line and receives the compressive force when a horizontal external force is applied to the rectangular structural material to form a parallelogram. Then, even if the compression-side diagonal member receives a compressive force while the swing is small, the compressive force is relieved or eliminated as the swing increases and deformation increases. By utilizing the property that the deformation amount of the diagonal on the shortened side of the frame is large even under such a large vibration, in the vibration damping structure 100 incorporating the vibration damping device 10A, the diagonal material is buckled and broken. Nothing will happen.

  The vibration damping device 10A that indirectly couples the corner ICO of the outer frame 11A and the corner OCI of the inner frame 12A smaller than the outer frame 11A is connected to the diagonal member 104 via a joint 13A that matches the diagonal axis DL. As a result, even if a large shake is applied, the deformation amount of the diagonal line on the shortened side of the frame is large, so that the diagonal member 104 is not buckled and destroyed. In addition, since the vibration damping device 10A is combined with the outer frame 11A and the inner frame 12A, the rigidity is increased due to the influence of the rigidity of the inner frame 12A ′, and can be processed with a large outer frame 11A ′. Workability is improved.

  Further, the vibration damping structure 100 is subjected to a large vibration by the diagonal member 104 disposed on the diagonal line DL of the rectangular structural member 101 and the vibration damping device 10A connected via the joint 13A that coincides with the diagonal member axis DL. However, since the deformation amount of the diagonal line on the shortened side of the frame is large, the diagonal member itself is not buckled and destroyed. In addition, the vibration damping device and the vibration damping structure according to the present invention do not require a large structure and the construction cost is low, and the vibration damping performance is stable and highly reliable regardless of the characteristics of the earthquake or the building structure. It goes without saying that maintenance is unnecessary and durability is good.

  In the vibration damping device 10A shown in FIG. 10A, the rectangular center O2 of the inner frame 12A is coincident with the rectangular center O1 of the outer frame 11A. Then, the rectangular center O1 of the outer frame 11A, the rectangular center O2 of the inner frame 12A, and the rectangular center O3 of the rectangular structure material 101 all coincide in the vibration damping structure 100. The linear member 14A connecting the outer frame 11A and the inner frame 12A is disposed on the same axis as the diagonal line DL of the outer frame 11A and the rectangular structural member 101. As a result, the linear member 14A is disposed on the same axis as the joint 13A extending outward from each corner OCO on the diagonal line DL, so that the strong damping device 10A and the damping structure 100 are provided. Can do.

  This vibration damping device 10A combines the outer frame 11A and the inner frame 12A, which have different reduction ratios with respect to the rectangular structural member 101, so that the rectangular centers coincide with each other, thereby yielding the sum of the strength of the outer frame 11A and the inner frame 12A. Can be provided. In addition, the vibration control device 10A has a plurality of frames having different rigidity and different stresses in the plastic region, and each frame has a different amount of deformation that causes a fracture such as a crack or a fracture. It will not be destroyed and the vibration control performance will not be lost.

  A vibration damping device 10C shown in FIG. 10C is obtained by adding another inner frame to the above-described vibration damping device 10A. That is, the vibration damping device 10C has one rectangular outer frame 11C, an inner frame 12C1 that is smaller than the outer frame 11C, and has a similar shape to the outer frame 11C, and is smaller than the inner frame 12C1, and has a similar shape to the inner frame 12C1. The inner frame 12C2 and the joint 13C extending from each corner in the outward direction on the diagonal line of the outer frame 11C.

  Each corner of the outer frame 11C is indirectly coupled in the same plane as the corner of the inner frame 12C1, and each corner of the inner frame 12C1 is indirectly coupled in the same plane as the corner of the inner frame 12C2. ing. That is, each corner of the outer frame 11C is connected to a corner of the inner frame 12C1 via a straight member 14C1, and each corner of the inner frame 12C1 is connected to a corner of the inner frame 12C2 via a straight member 14C2.

  The inner frame 12C1 and the outer frame 11C are in the same plane, and the sides constituting the rectangle of the inner frame 12C1 are parallel or perpendicular to the sides constituting the rectangle of the outer frame 11C. Further, each side constituting the rectangle of the inner frame 12C2 is parallel to or perpendicular to each side constituting the rectangle of the inner frame 12C1. The inner frame 12C2 does not have diagonal materials that are arranged diagonally and connect the diagonals of the inner frame 12C2.

  Similarly, the vibration damping device 10 </ b> C is incorporated in the vibration damping structure 100. The predetermined ratio (reduction rate α) of the outer frame 11C in the vibration damping device 10C can be obtained based on the same concept as the vibration damping device 10A, and α = 0.04 to 0.5. Further, since the reduction rate of the inner frame 12C2 can be regarded as the above-described reduction rate β, the reduction rate β of the inner frame 12C2 is β = 0.02 to 0.3. The reduction ratio of the inner frame 12C1 is between the outer frame 11C and the inner frame 12C2, and is 0.03 to 0.4.

  In the vibration damping device 10C, the corner of the outer frame 11C and the corner of the inner frame 12C1 smaller than the outer frame 11C are indirectly coupled, and the corner of the inner frame 12C1 and the corner of the inner frame 12C2 smaller than the inner frame 12C1 are indirectly coupled. Combined with The vibration damping device 10C is connected to the diagonal member 104 via the joint 13C that coincides with the diagonal axis, so that the deformation of the diagonal line on the shortened side of the frame is large even when subjected to a large shake, so the diagonal member 104 itself No more buckling and breaking. Further, the vibration damping device 10C has high rigidity and good workability by combining the outer frame 11C, the inner frame 12C1, and the inner frame 12C2.

  In the vibration damping device 10C, furthermore, the rectangular center O21 of the inner frame 12C1 and the rectangular center O22 of the inner frame 12C2 coincide with the rectangular center O1 of the outer frame 11C. Further, the linear member 14C1 and the linear member 14C2 connecting the outer frame 11C, the inner frame 12C1, and the inner frame 12C2 are arranged on the same axis as the diagonal lines of the outer frame 11C and the rectangular structural member 101. As a result, the linear member 14C1 and the linear member 14C2 are disposed on the same axis as the joints 13C extending outward from the respective corners on the diagonal line, so that a strong vibration damping device 10C can be provided.

  This vibration damping device 10C combines the outer frame 11C having a different reduction ratio with respect to the rectangular structural member 101 and the plurality of inner frames 12C1 and 12C2 so that the rectangular centers coincide with each other, whereby the strength of the outer frame 11C, the inner frame 12C1 and the inner frame 12C1 are reduced. The sum of the proof strengths of the frames 12C2 can be provided. Further, the vibration damping device 10C has a plurality of frames having different rigidity and different stresses in the plastic region, and each frame has a different amount of deformation that causes breakage such as cracks and breaks. It will not be destroyed and the vibration control performance will not be lost at once.

  The vibration damping device 10B shown in this figure (B) includes one rectangular outer frame 11B, four inner frames 12B1 to 12B4 that are smaller than the outer frame 11B and have the same shape as the outer frame 11B, On the diagonal line DL (indicated by the alternate long and short dash line in the figure) of the outer frame 11B, there are provided joints 13B extending outward from the respective corners OCO. Each side (center line) constituting the outer frame 11B and each side (center line) constituting the inner frames 12B1 to 12B4 are rigidly connected or integrally formed with each other, and each of the outer frame 11B and the inner frames 12B1 to 12B4 is formed. The corner is rigid. Each corner ICO of the outer frame 11B is directly coupled to one corner OCI of the inner frames 12B1 to 12B4. That is, each corner ICO of the outer frame 11B coincides with one corner OCI of the inner frames 12B1 to 12B4.

  For example, the upper left corner ICO of the outer frame 11B is arranged so as to coincide with the upper left corner OCI of the inner frame 12B1 existing on the inner left side of the outer frame 11B. Further, the upper right corner ICO of the outer frame 11B is arranged so as to coincide with the upper right corner OCI of the inner frame 12B2 existing on the inner right side of the outer frame 11B. Further, the lower left corner ICO of the outer frame 11B is arranged so as to coincide with the lower left corner OCI of the inner frame 12B3 existing inside the outer frame 11B and located at the lower left. Further, the lower right corner ICO of the outer frame 11B is arranged so as to coincide with the lower right corner OCI of the inner frame 12B4 located inside the outer frame 11B and located at the lower right.

  The four inner frames 12B1 to 12B4 and the outer frame 11B are in the same plane, and each side constituting the rectangle of each inner frame 12B1 to 12B4 is parallel or perpendicular to each side constituting the rectangle of the outer frame 11B. . Since each corner ICO of the outer frame 11B coincides with one corner OCI of the inner frames 12B1 to 12B4, one each of the vertical side and the horizontal side of the inner frames 12B1 to 12B4 It coincides with the vertical and horizontal sides. For example, the left vertical side of the inner frame 12B1 coincides with the left vertical side of the outer frame 11B, and the upper horizontal side of the inner frame 12B1 coincides with the upper vertical side of the outer frame 11B. Yes. The inner frames 12B1 to 12B4 do not have diagonal materials that are arranged on the diagonal line DL and connect the diagonals of the inner frames 12B1 to 12B4.

  The vibration damping device 10B is incorporated in the vibration damping structure 100 that forms a part of the building structure, similarly to the vibration damping device 10A shown in FIG. The vibration damping device 10 </ b> B includes an outer frame 11 </ b> B having a shape similar to that of the rectangular structure material 101 obtained by reducing the rectangular structure material 101 including the pillar 102 and the beam 103 by a predetermined ratio (α). Each of the inner frames 12B1 to 12B4 includes a frame obtained by reducing the rectangular structure material 101 at a ratio (β) smaller than the predetermined ratio (α). That is, the sides of the inner frames 12B1 to 12B4 are shorter than the corresponding sides of the outer frame 11B.

  As described above, the rigidity of the vibration damping structure 100 is inversely proportional to the third power of the reduction ratio of the size of the vibration damping device 10B with respect to the size of the rectangular structural material 101, and therefore the inner frames 12B1 reduced at a smaller ratio (β). The rigidity of 12B4 is more greatly affected. Similarly to the description of the vibration damping device 10A, the upper limit value of the reduction rate β of the inner frames 12B1 to 12B4 is β = 0.3 from the result of the intensity calculation, and the lower limit value is β = 0.02. is there. In this case, the reduction rate α of the outer frame 11B is, in this example, two inner frames 12B1 to 12B4 arranged vertically and horizontally, so that the lower limit is 0.04 or more and the upper limit is 0. 6 or more. However, it is preferable that the size of the outer frame 11 </ b> A is substantially about half the size of the rectangular structural member 101 at the maximum.

  Similarly to the vibration damping device 10A shown in FIG. 9E, the vibration damping structure 100 has the damping center 100 so that its rectangular center O3 coincides with the rectangular center O1 of the outer frame 11B of the damping device 10B. A vibration damping device 10B is provided by connecting each joint 13B of the vibration device 10B and each diagonal member 104 corresponding to each corner ICS of the rectangular structure material 101. That is, in the vibration damping structure 100, the rectangular center O1 of the outer frame 11B of the vibration damping device 10B coincides with the rectangular center O3 of the rectangular structural material 101, and the joint 13B of the vibration damping device 10B is connected to each corner of the rectangular structural material 101. The diagonal member 104 corresponding to the ICS is connected. By connecting the frame-shaped damping device 10B similar to the rectangular structure material 101 in this way, the damping structure 100 can return to its original shape even when the damping device 10B is repeatedly subjected to positive and negative deformations. Therefore, it can have excellent vibration damping performance.

  In addition, in the vibration damping device 10A, in the same manner as shown in FIG. 4F, in the vibration damping structure 100 in which the vibration damping device 10B is incorporated, the diagonal material is not buckled and broken. A vibration damping device 10B that directly connects the corner ICO of the outer frame 11B and the corner OCI of the inner frame 12B smaller than the outer frame 11B is connected to the diagonal member 104 via a joint 13B that coincides with the diagonal axis DL. As a result, even if a large shake is applied, the deformation amount of the diagonal line on the shortened side of the frame is large, so that the diagonal member 104 is not buckled and destroyed. Further, the vibration damping device 10B has high rigidity and good workability by combining the outer frame 11B and the inner frame 12B.

  Further, the vibration damping structure 100 is subjected to a large vibration by the vibration damping device 10B connected via the joint 13B that coincides with the diagonal material 104 arranged on the diagonal line DL of the rectangular structural material 101 and the diagonal material axis DL. However, since the deformation amount of the diagonal line on the shortened side of the frame is large, the diagonal member itself is not buckled and destroyed. In addition, the vibration damping device and the vibration damping structure according to the present invention do not require a large structure and the construction cost is low, and the vibration damping performance is stable and highly reliable regardless of the characteristics of the earthquake or the building structure. It goes without saying that maintenance is unnecessary and durability is good.

  Further, in the vibration damping device 10B, the rectangular centers O21 to O24 of the inner frames 12B1 to 12B4 do not coincide with the rectangular center O1 of the outer frame 11B. On the other hand, each corner ICO of the outer frame 11B coincides with one corner OCI of the inner frames 12B1 to 12B4, and the plurality of inner frames 12B1 to 12B4 are arranged in a lattice pattern inside the outer frame 11B. That is, the size of the outer frame 11B is exactly twice the size of one of the inner frames. Then, in the inner frames 12B1 to 12B4, the vertical side and the horizontal side different from the side that matches the vertical side and the horizontal side of the outer frame 11B are the vertical sides of the adjacent inner frames 12B1 to 12B4. And the side matches.

  For example, the vertical side on the right side of the inner frame 12B1 coincides with the vertical side on the left side of the adjacent inner frame 12B2, and the lower side on the inner frame 12B1 is the horizontal side on the upper side of the adjacent inner frame 12B3. It matches the side. The lower right corner of the inner frame 12B1, the lower left corner of the inner frame 12B2, the upper right corner of the inner frame 12B3, and the upper left corner of the inner frame 12B4 are the same. The rectangular center O1 of the outer frame 11B is located in the middle of the rectangular centers O21 to O24 of the inner frames 12B1 to 12B4. The rectangular center O1 of the outer frame 11B and the rectangular centers O21 to O24 of the inner frames 12B1 to 12B4 are all arranged on the diagonal line DL. Since the rectangular center O1 of the outer frame 11B, the rectangular centers O21 to O24 of the inner frames 12B1 to 12B4, and the rectangular center O3 of the rectangular structural member 101 are all arranged on the same axis as the diagonal line DL, the strong vibration damping device 10B And the damping structure 100 can be provided.

  The vibration damping device 10B has high rigidity because the inner frames 12B1 to 12B4 are arranged in a lattice shape inside the outer frame 11B, and thus has the strength of the inner frames 12B1 to 12B4. Processability is good because it can be manufactured in size. Further, since the vibration damping device 10B has a large number of inner frames, even if some of the inner frames are destroyed, the vibration damping performance is not lost at a stretch.

  The vibration damping device 10D shown in FIG. 4D includes 16 inner frames 12D1 to 12D16, whereas the vibration damping device 10B described above includes the four inner frames 12B1 to 12B4. is there. That is, the vibration damping device 10D includes one rectangular outer frame 11D, 16 inner frames 12D1 to 12D16 that are smaller than the outer frame 11D, have a similar shape to the outer frame 11D, and have the same size, and the outer frame 11D. And a joint 13D extending outward from each corner on a diagonal line. In addition, although a part of reference numerals of the inner frame in FIG. 4D is omitted, it is assumed that serial numbers are assigned from left to right and from top to bottom.

  Each corner of the outer frame 11D is directly coupled to the corners of the inner frames 12D1, 12D4, 12D13, and 12D16. That is, each corner of the outer frame 11D coincides with one corner of the inner frames 12D1, 12D4, 12D13, and 12D16.

  For example, the upper left corner of the outer frame 11D is arranged so as to coincide with the upper left corner of the inner frame 12D1 existing at the upper left side inside the outer frame 11D. Further, the upper right corner of the outer frame 11D is arranged so as to coincide with the upper right corner of the inner frame 12D4 that is located at the innermost right side of the outer frame 11D. Further, the lower left corner of the outer frame 11D is arranged so as to coincide with the lower left corner of the inner frame 12D13 that is located at the innermost left side of the outer frame 11D. In addition, the lower right corner of the outer frame 11D is arranged so as to coincide with the lower right corner of the inner frame 12D16 existing inside the outer frame 11D and located at the lowermost right.

  The 16 inner frames 12D1 to 12D16 and the outer frame 11D are in the same plane, and each side constituting the rectangle of each of the inner frames 12D1 to 12D16 is parallel or perpendicular to each side constituting the rectangle of the outer frame 11D. Eggplant. Since each corner of the outer frame 11D coincides with one corner of the inner frames 12D1, 12D4, 12D13, and 12D16, one each of the vertical and horizontal sides of the inner frames 12D1, 12D4, 12D13, and 12D16 Corresponds to the vertical and horizontal sides of the outer frame 11D. For example, the left vertical side of the inner frame 12D1 matches the left vertical side of the outer frame 11D, and the upper horizontal side of the inner frame 12D1 matches the upper horizontal side of the outer frame 11D. Yes. The inner frames 12D1 to 12D16 do not have diagonal materials that connect the diagonals of the inner frames 12D1 to 12D16.

  The upper horizontal side of the inner frame 12D2 matches the upper horizontal side of the outer frame 11D, and the left vertical side of the inner frame 12D2 matches the right vertical side of the inner frame 12D1. The upper horizontal side of the inner frame 12D3 matches the upper horizontal side of the outer frame 11D, and the right vertical side of the inner frame 12D3 matches the left vertical side of the inner frame 12D4. The upper horizontal side of the inner frame 12D5 matches the lower horizontal side of the inner frame 12D1, and the left vertical side of the inner frame 12D5 matches the left vertical side of the outer frame 11D. The upper horizontal side of the inner frame 12D6 matches the lower horizontal side of the inner frame 12D2, and the left vertical side of the inner frame 12D6 matches the right vertical side of the inner frame 12D5. The upper horizontal side of the inner frame 12D8 matches the lower horizontal side of the inner frame 12D4, and the right vertical side of the inner frame 12D8 matches the right vertical side of the outer frame 11D. The upper horizontal side of the inner frame 12D7 matches the lower horizontal side of the inner frame 12D3, and the right vertical side of the inner frame 12D7 matches the left vertical side of the inner frame 12D8. The positional relationship between the inner frames 12D9 to 12D16 is the same.

  The vibration damping device 10D is incorporated in the vibration damping structure 100, similarly to the vibration damping device 10A shown in FIG. The predetermined ratio (reduction rate α) of the outer frame 11D in the vibration control device 10D can be obtained in the same way as the vibration control device 10B, and the reduction rate β of the inner frames 12D1 to 12D16 is β = 0.02. Since the outer frame 11D is preferably about half the size of the rectangular structural member 101 at the maximum, α = 0.08 to 0.5.

  The vibration damping device 10D that directly couples the corner of the outer frame 11D and the corners of the inner frames 12D1, 12D4, 12D13, and 12D16 smaller than the outer frame 11D includes the diagonal member 104 through the joint 13D that coincides with the diagonal axis DL. , The diagonal of the diagonal member 104 itself is not buckled and broken because the amount of deformation of the diagonal on the shortened side of the frame is large even when subjected to a large shake. Further, the vibration damping device 10D has high rigidity and good workability by combining the outer frame 11D and the inner frames 12D1 to 12D16.

  Further, in the vibration damping device 10D, the rectangular centers O21 to O216 of the inner frames 12D1 to 12D16 do not coincide with the rectangular center O1 of the outer frame 11D, while the corners of the outer frame 11D are the inner frames 12D1 and 12D4. , 12D13, and 12D16 coincide with one corner, and the 16 inner frames 12D1 to 12D16 are arranged in a grid pattern inside the outer frame 11D. That is, the size of the outer frame 11D is exactly four times the size of one of the inner frames. Then, the inner frames 12D1 to 12D16 are arranged in a lattice pattern inside the outer frame 11D without overlapping each other and without a gap.

  For example, the rectangular center O1 of the outer frame 11D is located in the middle of the rectangular center O21 of the inner frame 12D1 and the rectangular center O216 of the inner frame 12D16, and the rectangular center O26 of the inner frame 12D6 and the rectangular center O211 of the inner frame 12D11. Located in the middle. Further, the rectangular center O1 of the outer frame 11D and the rectangular centers O21, O26, O211, and O216 of the inner frames 12D1, 12D6, 12D11, and 12D16 are arranged on the diagonal line DL, and are all arranged on the same axis as the diagonal line DL. The strong vibration damping device 10D and the vibration damping structure 100 can be provided.

  The vibration damping device 10D has a high rigidity because the inner frames 12D1 to 12D16 are arranged in a lattice shape inside the outer frame 11D, and thus has the strength of the inner frames 12D1 to 12D16. Processability is good because it can be manufactured in size. Further, since the vibration damping device 10D has a large number of inner frames, even if some of the inner frames are destroyed, the vibration damping performance is not lost at a stretch.

<First Example>
With reference to FIG. 1 and FIG. 2, the vibration damping device 10A ′ and the vibration damping structure 100A ′ in the present embodiment will be described. The vibration damping device 10A ′ is an embodiment of the vibration damping device 10A shown in FIG. 14A expressed by the center line of each part, and the vibration damping structure 100A ′ is shown in FIG. ) Of the vibration damping structure 100 shown in FIG.

  The vibration damping device 10A ′ includes one rectangular outer frame 11A ′, one inner frame 12A ′ that is smaller than the outer frame 11A ′ and similar to the outer frame 11A ′, and one outer frame 11A ′ (one point in the figure). Joints 13A ′ extending outward from the respective corners OCO are provided on the diagonal lines DL (indicated by chain lines). The sides 11A'1, 11A'2, 11A'3, 11A'4 constituting the outer frame 11A 'are integrally formed with each other. Further, the sides 12A'1, 12A'2, 12A'3, 12A'4 constituting the inner frame 12A 'are integrally formed with each other. Accordingly, each corner of the outer frame 11A 'and the inner frame 12A' has rigidity. Each corner ICO of the outer frame 11A 'is connected by integral molding indirectly via a straight line member 14A' in the same plane as the corner OCI of the inner frame 12A '.

  The outer frame 11A ', the linear member 14A', and the inner frame 12A 'of the vibration damping device 10A' are all made of steel, and are manufactured by integral molding by a casting method such as a die casting method. However, the manufacturing method is not limited to this. For example, the corners of the sides 11A'1, 11A'2, 11A'3, and 11A'4 of the outer frame 11A 'may be in rigid contact with each other. The thickness of each side 11A'1, 11A'2, 11A'3, 11A'4 constituting the outer frame 11A ', as viewed from the front, each side 12A'1, 12A'2, 12A' constituting the inner frame 12A ' The thickness of 3, 12A′4 in the front view and the thickness of the straight member 14A ′ in the front view are each about 10 mm. The thickness in side view is not particularly limited, but is preferably equal to or less than the thickness in side view of the rectangular structure material 101A ′.

  The side 12A′2 of the inner frame 12A ′ is parallel to the side 11A′2 of the outer frame 11A ′, and the side 12A′4 of the inner frame 12A ′ is parallel to the side 11A′4 of the outer frame 11A ′. In consideration of play for deformation, the two are separated by a gap of about 10 mm. The side 12A′1 of the inner frame 12A ′ is parallel to the side 11A′1 of the outer frame 11A ′, and the side 12A′3 of the inner frame 12A ′ is parallel to the side 11A′3 of the outer frame 11A ′. Since both frames are similar to each other, they are separated by a gap of about 38 mm. The vertical size of the outer frame 11A ′ at the center line, which is the line of action of force, is about 230 mm, and the horizontal size is about 95 mm. In addition, the vertical size of the inner frame 12A 'at the center line, which is the line of action of force, is about 132 mm, and the horizontal size is about 55 mm. All of the aspect ratios are about 2.4, and they are similar rectangles. Also, the side 12A′1 of the inner frame 12A ′ is the side 11A′2 and side 11A′4 of the outer frame 11A ′, and the side 12A′3 of the inner frame 12A ′ is the side 11A′2 and side 11A of the outer frame 11A ′. '4' is perpendicular to each other.

  The joint 13A 'extends by being integrally molded from each corner OCO of the outer frame 11A', and the joint 13A 'and the corner of the outer frame 11A' are coupled with rigidity. The joint 13A ′ is a part for connecting the vibration damping device 10A ′ to the diagonal member 104A ′, has a thickness substantially the same as the thickness of the outer frame 11A ′, and facilitates connection to the diagonal member 104A ′. In this embodiment, it is formed flat and has three bolt holes in order to secure a strong bonding force with the diagonal member 104A ′. In this embodiment, the joint 13A 'is connected to the diagonal member 104A' by bolting. The connecting method may be anything as long as it can be securely connected, such as welding and screwing, in addition to bolting. However, it is preferable that the joint 13A 'is detachable from the diagonal member 104A' so that the vibration damping device 10A 'can be easily replaced when it is destroyed by an earthquake or the like.

  A vibration damping device 10A 'shown in FIG. 1 is incorporated in a vibration damping structure 100A' as shown in FIG. The damping structure 100A ′ includes a rectangular structural member 101A ′ composed of a column 102A ′ and a beam 103A ′, an oblique member 104A ′ disposed on the diagonal line DL of the rectangular structural member 101A ′, and an oblique member 104A ′. And a vibration damping device 10A ′ connected to the diagonal member 104A ′ by a joint 13A ′. The vibration damping device 10A 'can be applied to a rectangular structural member 101A' similar to the outer frame 11A 'in which the aspect ratio of the pillar 102A' and the beam 103A 'is 2.4. Since the most preferable β is 0.05 as described above, the vibration damping device 10A ′ can be applied to the rectangular structural member 101A ′ in which the column 102A ′ is about 2.64 m and the beam 103A ′ is about 1.1 m. Most preferred. The diagonal member 104A 'only needs to be a material that can withstand tension, such as a reinforcing bar or a steel pipe.

  The damping structure 100A ′ has a rectangular structure with each joint 13A ′ of the damping device 10A ′ so that its rectangular center coincides with the rectangular centers of the outer frame 11A ′ and the inner frame 12A ′ of the damping device 10A ′. A vibration damping device 10A ′ is provided by connecting to each diagonal material 104A ′ corresponding to each corner of the material 101A ′. By connecting the frame-shaped vibration damping device 10A ′ similar to the rectangular structural member 101A ′ in this way, the vibration damping structure 100A ′ can have the original shape even if the vibration damping device 10A ′ is repeatedly subjected to positive and negative deformations. Therefore, it is possible to have excellent vibration damping performance. Further, the linear member 14A 'that connects the outer frame 11A' and the inner frame 12A 'is disposed on the same axis as the diagonal line DL of the outer frame 11A' and the rectangular structural member 101A '. As a result, the linear member 14A ′ is disposed on the same axis as the joint 13A ′ extending outward from each corner OCO on the diagonal line DL, so that the strong damping device 10A ′ and the damping structure 100A ′ are provided. Can be provided.

  FIG. 3 shows a state in which the load is gradually increased in the vibration damping device 10A ′ incorporated in the vibration damping structure 100A ′ in the destructive test. This figure (A) is a front view of the vibration damping device 10A 'when a horizontal load is applied to the beam 103A' on the rectangular structural member 101A '. This figure (B) shows the load several times. The vibration damping device 10A ′ when it breaks as a result of repetition is viewed from the front. As shown in this figure (A), force is transmitted through the diagonal member 104A ′ and the joint 13A ′, and the outer frame 11A ′, the inner frame 12A ′, and the straight member 14A ′ in the vibration damping device 10A ′ are plastically deformed. By absorbing vibration energy. If the amount of deformation or the number of deformations exceeds the characteristics of the vibration control structure 100A ', the inner frame 12A' is destroyed by breakage or the like as shown in FIG. Usually, the inner frame 12A 'has a smaller amount of deformation that causes breakage, so breakage occurs first on the shorter side of the inner frame 12A'.

  FIG. 4 shows a load deformation curve of the vibration damping device 10A 'when a horizontal load is applied to the rectangular structural member 101A'. Since it is made of steel, the plastic strain is smaller than that of aluminum described later. The horizontal load just before the break and the corresponding horizontal displacement are about 60 mm when the horizontal load is about 15 kN.

  Here, the vibration damping device A consisting of only a single frame shown in FIG. 5A corresponding to the outer frame 11A ′ of this embodiment, and FIG. 5B corresponding to the inner frame 12A ′ of this embodiment. The vibration damping device B consisting of only a single frame shown in FIG. 5 and the vibration damping device 10A ′ of the present embodiment will be compared. In the case of this figure, the horizontal displacement (interlayer displacement) is represented by an interlayer displacement angle (rad: radians). According to this, a certain horizontal displacement in the vibration damping device A consisting of only a single frame corresponding to the outer frame 11A ′ and a certain horizontal in the vibration damping device B consisting of only a single frame corresponding to the inner frame 12A ′. It can be seen that the sum of the loads in the displacement is almost equal to the load in the certain horizontal displacement of the vibration damping device 10A ′ of the present embodiment in any horizontal displacement. That is, it can be seen that the vibration damping device 10A 'has a proof strength that is the sum of the proof strength of the outer frame 11A' and the proof strength of the inner frame 12A '.

  When the amount of horizontal displacement gradually increases, only the inner frame 12A ′ is destroyed first, and the outer frame 11A ′ remains unbroken, so that the entire damping device 10A ′ loses damping performance at once. There is no. That is, by having a plurality of frames having different stiffnesses in the outer frame 11A ′ and the inner frame 12A ′ and different stresses in the plastic region, the plurality of frames are not destroyed at once, and the vibration damping performance is lost at once. There is nothing to do.

  Further, as shown in FIG. 6, in the vibration damping device 10A ′ incorporated in the vibration damping structure 100A ′, the deformation of the contraction side diagonal line is the same as the deformation of the expansion side diagonal line and the deformation of the contraction side diagonal line. Is big. For example, when the interlayer displacement is 1/30 radians, the extension-side diagonal displacement is 25 mm, while the shortened-side diagonal displacement is about 28 mm. Then, even if the compression-side diagonal member receives a compressive force while the swing is small, the compressive force is relieved or eliminated as the swing increases and deformation increases. Therefore, in the vibration damping structure 100A ′ in which the vibration damping device 10A ′ is incorporated, the diagonal member 104A ′ is not buckled and broken.

  Since the vibration damping device 10A 'is a steel frame-like member disposed in the middle of the main structure diagonal member, it does not require a large-scale structure, has a low construction cost, and has characteristics of earthquakes and building structures. Regardless, the vibration damping performance is stable and reliable, and maintenance is not required and durability is good. The vibration damping device 10A ′ is such a steel frame-like member. By combining the outer frame 11A ′ and the inner frame 12A ′ having different sizes, the proof stress increases, the rigidity is high, and the workability is good. Become.

<Second Example>
With reference to FIGS. 7 and 8, the vibration damping device 10B ′ and the vibration damping structure 100B ′ in the present embodiment will be described. In the following description, differences from the above embodiment will be mainly described. The vibration damping device 10B ′ is an implementation of the vibration damping device 10B shown in FIG. 14B expressed by the center line of each part.

  The vibration damping device 10B ′ includes one rectangular outer frame 11B ′, four inner frames 12B′1 to 12B′4 that are smaller than the outer frame 11B ′ and have a similar shape to the outer frame 11B ′, and the outer frame 11B ′. And a joint 13B ′ extending outward from each corner OCO on a diagonal line DL (indicated by a dashed line in the figure). The sides constituting the outer frame 11B ′ and the sides constituting the inner frames 12B′1 to 12B′4 are integrally formed with each other, and the corners of the outer frame 11B ′ and the inner frames 12B′1 to 12B′4 are It has rigidity. Each corner ICO of the outer frame 11B 'is directly coupled to one corner OCI of the inner frames 12B'1 to 12B'4. In other words, each corner ICO of the outer frame 11B 'coincides with one corner OCI of the inner frames 12B'1 to 12B'4.

  The outer frame 11B 'and the inner frame 12B' of the vibration damping device 10B 'are both made of aluminum and are manufactured by integral molding by a casting method such as a die casting method. However, the manufacturing method is not limited to this. The thickness of each side 11B′1, 11B′2, 11B′3, 11B′4 constituting the outer frame 11B ′, and the thickness of each side constituting the inner frames 12B′1 to 12B′4. Each is about 16 mm.

  Each side constituting the rectangle of the inner frame 12B'1 to 12B'4 is parallel or perpendicular to each side constituting the rectangle of the outer frame 11B '. Since each corner ICO of the outer frame 11B ′ coincides with one corner OCI of the inner frames 12B′1 to 12B′4, each of the vertical side and the horizontal side of the inner frame 12B′1 to 12B′4. One by one coincides with the vertical and horizontal sides of the outer frame 11B ′. The vertical size of the outer frame 11B 'at the center line, which is a line of action of force, is about 230 mm, and the horizontal size is about 95 mm. The vertical and horizontal sizes of the inner frame 12B 'at the center line, which is the line of action of the force, are half the vertical and horizontal sizes of the outer frame 11B', and are similar rectangles.

  The joint 13B 'extends by being integrally molded from each corner OCO of the outer frame 11B', and the joint 13B 'and the corner of the outer frame 11B' are coupled with rigidity. The joint 13B 'has substantially the same thickness as the outer frame 11B' and has one bolt hole. The joint 13B 'is a part for connecting the vibration damping device 10B' to the diagonal member 104B 'via an expansion joint 15B' molded as a separate member. In this embodiment, the joint 13A 'is bolted to the expansion joint 15B' and the expansion joint 15B 'is bolted to the diagonal member 104A', so that the vibration damping device 10B 'is connected to the vibration damping structure 100B'. In this embodiment, the expansion joint 15B ′ is an independent member for connecting the joint 13B ′ of the vibration damping device 10B ′ to the diagonal member 104B ′, and is thinner than the thickness of the outer frame 11B ′ when viewed from the side. It is formed flat so that it can be easily connected to 104B ', and has three bolt holes to ensure a strong coupling force with the diagonal member 104B'.

  The vibration damping device 10B 'shown in FIG. 7 is incorporated in the vibration damping structure 100B' as shown in FIG. The damping structure 100B ′ includes a rectangular structural material 101B ′ composed of a pillar 102B ′ and a beam 103B ′, an oblique material 104B ′ disposed on a diagonal line DL of the rectangular structural material 101B ′, and an oblique material 104B ′. An expansion joint 15B ′ disposed on the diagonal line DL and a vibration damping device 10B ′ connected to the diagonal member 104B ′ by a joint 13B ′. The vibration damping device 10B 'can be applied to a rectangular structure material 101B' similar to the outer frame 11B 'in which the aspect ratio of the pillar 102B' and the beam 103B 'is 2.4, as in the above embodiment.

  The damping structure 100B ′ has its joints 13B ′ / expansion joints 15B ′ of the damping device 10B ′ so that its rectangular center O3 coincides with the rectangular center O1 of the outer frame 11B ′ of the damping device 10B ′. And a damping device 10B ′ is provided by connecting to each diagonal material 104B ′ corresponding to each corner ICS of the rectangular structure material 101B ′. By connecting the frame-shaped vibration damping device 10B ′ similar to the rectangular structural member 101B ′ in this way, the vibration damping structure 100B ′ can retain its original shape even when the vibration damping device 10B ′ is repeatedly subjected to positive and negative deformations. Therefore, it is possible to have excellent vibration damping performance.

  FIG. 9 shows a state in which the load is gradually increased in the vibration damping device 10B ′ incorporated in the vibration damping structure 100B ′ in the destructive test. This figure (A) is a front view of the vibration damping device 10B 'when a horizontal load is applied to the beam 103B' on the rectangular structural member 101B '. This figure (B) shows the load several times. The vibration damping device 10B ′ when it breaks as a result of repetition is viewed from the front. As shown in this figure (A), force is transmitted through the diagonal member 104B ′ and the expansion joint 15B ′ / joint 13B ′, and the outer frame 11B ′ and the inner frame 12B ′ in the vibration damping device 10B ′ are plastically deformed. By absorbing vibration energy. When the amount of deformation or the number of deformations in accordance with the characteristics of the damping structure 100B 'is exceeded, the inner frame 12B' is broken by breakage or the like as shown in FIG. Usually, the inner frame 12B 'has a smaller amount of deformation that causes breakage. Therefore, breakage occurs first on a short side of the inner frame 12B'.

  10A shows a load deformation curve of a steel (steel) damping device 10B ′ when a horizontal load is applied to the rectangular structural member 101B ′, and FIG. 10B shows an aluminum damping device. 10B 'shows a load deformation curve. In the steel damping device 10B ', the horizontal load immediately before the break and the corresponding horizontal displacement are approximately 60 mm when the horizontal load is approximately 13 kN. Since the amount of horizontal displacement increases, the short horizontal side of the inner frame 12B ′ is destroyed first, and the outer frame 11B ′ remains unbroken, so that the entire damping device 10B ′ loses damping performance at once. There is no. The damping device 10B 'made of aluminum has a larger plastic strain than that made of steel, and it did not break in the experiment even when the horizontal displacement was about 95 mm when the horizontal load was about 22 kN. Even if the horizontal displacement amount is further increased, similarly, the side of the inner frame 12B ′ is destroyed first, and the outer frame 11B ′ remains without being destroyed. Damping performance will not be lost.

  Further, as shown in FIG. 11, the deformation of the expansion side diagonal line and the deformation of the contraction side diagonal line in the vibration suppression device 10B ′ incorporated in the vibration suppression structure 100B ′ are the same as the deformation of the contraction side diagonal line when the interlayer displacement is the same. Is big. For example, when the interlayer displacement is 1/30 radians, the extension-side diagonal displacement is 23 mm, while the shortened-side diagonal displacement is about 27 mm. Then, even if the compression-side diagonal member receives a compressive force while the swing is small, the compressive force is relieved or eliminated as the swing increases and deformation increases. Therefore, in the vibration damping structure 100B 'in which the vibration damping device 10B' is incorporated, the diagonal member 104B 'is not buckled and broken.

  Since the vibration damping device 10B 'is a metal frame-like member disposed in the middle of the main structure diagonal, the construction cost is low without requiring a large structure, and the characteristics of the earthquake and building structure are low. Regardless, the vibration damping performance is stable and reliable, and maintenance is not required and durability is good. The vibration damping device 10B 'is such a metal frame-like member. By combining the outer frame 11B' and the inner frame 12B 'having different sizes, the rigidity is high and the workability is improved.

<Third embodiment>
With reference to FIG. 12 and FIG. 13, the vibration damping device 10E ′ and the vibration damping structure 100E ′ in the present embodiment will be described. The vibration damping device 10E ′ of the present embodiment is a vibration damping device that combines a modification of the vibration damping device 10A ′ of the first embodiment described above and the vibration damping device 10B ′ of the second embodiment. In a modification of the vibration damping device 10A ′ of the first embodiment, the vibration damping device 10A ′ is formed flat so that the joint 13A ′ can be easily connected and has a plurality of bolt holes. Similar to ', it has approximately the same thickness as the outer frame 11A', and has one bolt hole. A modification of the vibration damping device 10A ′ of the first embodiment is the same as the vibration damping device 10A ′ except for the joint. Therefore, hereinafter, a modified example of the vibration damping device 10A ′ of the first embodiment will be described as the vibration damping device 10A ′.

  The vibration damping device 10E 'is a vibration damping device including the vibration damping device 10A' of the first embodiment and the vibration damping device 10B 'of the second embodiment in the thickness direction of the rectangular structural member 101E'. The thickness direction of the rectangular structural member 101E 'refers to the thickness direction in the side view of the column 102E' or the beam 103E 'constituting the rectangular structural member 101E' (depth direction in the front view). As shown in the figure, the vibration damping device 10E 'includes a vibration damping device 10B' on the front side and a vibration damping device 10A 'on the back side. The size of the outer frame of the vibration damping device 10B 'is the same as the size of the outer frame of the vibration damping device 10A'. However, it is not limited to this, You may have the outer frame of a mutually different magnitude | size. In addition, the size and shape of the joint 13E 'extending from each corner in the outward direction on the diagonal of the outer frame are the same, and the same shape as the joint of the vibration damping device 10B'. It is preferable that the rectangular center O1 of the outer frame of the vibration damping device 10A ', the rectangular center O1 of the outer frame of the vibration damping device 10B', and the rectangular center O3 of the rectangular structural member 101E 'all coincide.

  The expansion joint 15E 'is disposed so as to be sandwiched between the vibration damping device 10B' and the vibration damping device 10A ', and is bolted to the joint 13E' so as to function as the vibration damping device 10E 'as a unit. In this embodiment, the expansion joint 15E ′ has a portion corresponding to the outer frame of the vibration damping device 10B ′ and the vibration damping device 10A ′, and from each corner outwardly on a diagonal line of the portion corresponding to the outer frame. Each extends. Of course, the present invention is not limited to this, and it may not be provided with a portion corresponding to the outer frame, but may be constituted by a joint 13E ', a bolted portion, and a portion extending therefrom. The thickness in the side view of the vibration damping device 10E 'is preferably equal to or less than the thickness in the side view of the rectangular structural member 101E' including the thickness of the expansion joint 15E '.

  The vibration damping structure 100E 'including the vibration damping device 10E' includes a vibration damping device having a plurality of characteristics, that is, the vibration damping device 10B 'and the vibration damping device 10A', and can cope with various earthquake shakes. Further, since the vibration damping structure 100E ′ has a different amount of deformation that causes breakage such as cracks or breaks in each vibration damping device and the frame in each vibration damping device, even if a part is broken. The vibration control performance is not lost at once.

  In addition, this invention is not limited to the illustrated Example, The implementation by the structure of the range which does not deviate from the content described in each item of a claim is possible. That is, although the present invention has been particularly illustrated and described with respect to particular embodiments, it should be understood that the present invention has been described in terms of quantity, quantity, and amount without departing from the scope and spirit of the present invention. Various modifications can be made by those skilled in the art in application examples and other detailed configurations.

100 Damping structure 101 Rectangular structure material 102 Rectangular structure material (pillar)
103 Rectangular structure (beam)
104 Diagonal material 10 Damping device 11 Outer frame 12 Inner frame 13 Joint 14 Linear member 15 Expansion joint ICS Corner of rectangular structure material ICO Corner of outer frame OCO Corner of outer frame OCI Corner of inner frame DL Diagonal line O1 Rectangular center of outer frame O2 inner frame rectangle center O3 rectangle structure rectangle center

Claims (1)

A vibration damping device for damping a building structure including a rectangular structure material via a diagonal member arranged on a diagonal line of the rectangular structure material,
An outer frame having a similar shape to the rectangular structural material;
An inner frame having a similar shape to the rectangular structural material, each side being shorter than each side of the outer frame and parallel or perpendicular;
A joint for extending from the respective corners outward on the diagonal of the outer frame, and for connecting to the diagonal member;
With
Only each corner of the outer frame is combined with a corner of the inner frame,
The center of the inner frame coincides with the center of the outer frame, and each corner of the inner frame is connected to each corresponding corner of the outer frame via a straight line.
Damping device.

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