Vibration Control Device

Abstract

To provide a vibration control device which does not act in a deformation area of a base isolation layer generated in earthquake motion of a predetermined magnitude or smaller, acts only in megalo-earthquake and wind load exceeding the predetermined magnitude, and can suppress excessive deformation of the base isolation layer as a failsafe.SOLUTION: A vibration control device 1 is installed in a base isolation layer 12 between structures 18 and 19 of a building, includes a tensile material 3 connected to the structures 18 and 19 of the building, a displacement follow-up member 6 making the tensile material 3 follow displacement of the base isolation layer 12, and a stopper mechanism 5 provided on the tensile material 3, wherein when the base isolation layer 12 is displaced by a predetermined amount in a tensile direction, the stopper mechanism 5 comes into contact with the displacement follow-up member 6.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vibration control device. [Background technology]

[0002] Traditionally, bearings and dampers installed in seismically isolated buildings have a limit deformation as a device. It is common to design them so that they are below the performance guaranteed deformation for the so-called Level 2 earthquake motion set by the notification, or below the limit deformation for an earthquake about 1.5 times Level 2 as a margin of error set according to the case.

[0003] On the other hand, in recent years, there have been extremely large earthquakes exceeding 1.5 times the level of Level 2, and external forces beyond the design assumptions may act on the structure, causing these limit deformations to be exceeded. Therefore, there is a need for fail-safe devices that suppress deformation below the limit deformation or seismic isolation clearance so that the seismic isolation layer can be kept sound even in the event of earthquake motions that exceed assumptions.

[0004] Conventional fail-safe devices include a method of installing shock-absorbing rubber such as a fender in the seismic isolation clearance with a retaining wall (see Patent Document 1 below). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-133243 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the method described in Patent Document 1 has a problem in that the mechanism of the restoring force of the retaining wall during a collision is not clear, making it difficult to construct an analytical model.

[0007] Therefore, the present invention has been made in consideration of the above circumstances, and provides a seismic control device that does not act in the deformation area of ​​the seismic isolation layer caused by seismic motion below a certain magnitude, but acts only in the event of extremely large earthquakes or wind loads that exceed the certain magnitude, thereby suppressing excessive deformation of the seismic isolation layer as a fail-safe. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention employs the following means. In other words, the vibration control device of the present invention is a vibration control device installed in a seismic isolation layer between the structures of a building, and comprises a tension member connected between the structures of the building, a displacement following member that causes the tension member to follow the displacement of the seismic isolation layer, and a stopper mechanism provided on the tension member, and when the seismic isolation layer is displaced a predetermined amount in the tensile direction, the stopper mechanism abuts against the displacement following member.

[0009] In a seismic control device configured in this way, in the event of an extremely large earthquake or wind load exceeding a certain magnitude, the stopper mechanism comes into contact with the displacement tracking member as a fail-safe, and the distance (gap) between the stopper mechanism and the displacement tracking member disappears. This adds rigidity and strength to the tensile member, suppressing the deformation of the seismic isolation layer to below the limit deformation, preventing buckling of the laminated rubber installed in the seismic isolation layer, the fall-off of the seismic isolation layer, and collision with the retaining wall, thereby suppressing excessive deformation of the seismic isolation layer. Furthermore, in the case of earthquake motion below a certain magnitude, the distance between the stopper mechanism and the displacement tracking member does not disappear (becomes less than the gap amount), and the seismic control device does not bear the load, so the seismic isolation effect can be exerted as usual without impeding the long-period and energy absorption caused by seismic isolation.

[0010] In addition, in the seismic control device of the present invention, the stopper mechanism has an elastic member that can elastically deform in the axial direction of the tensile material, and the elastic member may abut against the displacement following member and elastically deform when the seismic isolation layer is displaced in the tensile direction by more than a predetermined amount.

[0011] In a vibration control device configured in this manner, in the event of an extremely large earthquake or wind load exceeding a specified magnitude, when the stopper mechanism comes into contact with the displacement following member, the elastic member elastically deforms and is compressed, thereby suppressing damage to the stopper mechanism and the displacement following member.

[0012] In addition, the vibration control device of the present invention is a vibration control device installed in a seismic isolation layer between the structural members of a building, and comprises a tension member connected between the structural members of the building, a displacement following member that causes the tension member to follow the displacement of the seismic isolation layer, a stopper mechanism provided on the tension member, and a jack that restores residual deformation of the seismic isolation layer, wherein the displacement following member is attached to the jack, and when the seismic isolation layer is displaced a predetermined amount in the tensile direction, the stopper mechanism abuts against the jack.

[0013] In a seismic control device constructed in this way, in the event of an extremely large earthquake or wind load exceeding a certain magnitude, the stopper mechanism comes into contact with the jack as a fail-safe, eliminating the distance (gap) between the stopper mechanism and the jack. This adds rigidity and strength to the tensile material, suppressing the deformation of the seismic isolation layer below the limit deformation, and preventing buckling of the laminated rubber installed in the seismic isolation layer, the fall-off of the seismic isolation layer, and collision with the retaining wall, thereby suppressing excessive deformation of the seismic isolation layer. In addition, when a tensile force acts on the seismic isolation device, the residual deformation of the seismic isolation layer can be restored to its original position by the pressing force of the jack via the tensile material. Furthermore, in the case of earthquake motion below a certain magnitude, the distance between the stopper mechanism and the jack does not disappear (becomes less than the gap amount), and the seismic control device does not bear the load, so the seismic isolation effect can be exerted as usual without impeding the long-period and energy absorption caused by seismic isolation.

[0014] In addition, in the seismic control device of the present invention, the stopper mechanism has an elastic member that can elastically deform in the axial direction of the tensile material, and the elastic member may abut against the jack and elastically deform when the seismic isolation layer is displaced in the tensile direction by more than a predetermined amount.

[0015] In a seismic control device configured in this manner, in the event of an extremely large earthquake or wind load exceeding a specified magnitude, when the stopper mechanism contacts the jack, the elastic member elastically deforms and is compressed, thereby suppressing damage to the stopper mechanism and the jack.

[0016] In addition, the vibration control device according to the present invention may include a vibration control damper connected between structural members of the building, and the tension member may be provided in parallel with the vibration control damper.

[0017] In a vibration control device configured in this manner, the vibration control damper is installed in parallel with the tension member, thereby improving the seismic isolation effect against earthquakes and wind loads.

[0018] In addition, in the vibration control device according to the present invention, the displacement tracking member may cause the tension member to follow the displacements of the seismic isolation layer in two horizontal directions.

[0019] In a seismic control device configured in this manner, the displacement tracking member causes the tensile material to follow the horizontal displacements of the seismic isolation layer in two directions, so that the device can smoothly respond to deformations in the seismic isolation layer.

[0020] In addition, in the vibration control device of the present invention, the displacement tracking member may have an attachment portion connected to the structure, and a support portion provided on the attachment portion and supporting the tension member so that the tension member can move relatively in the axial direction of the tension member.

[0021] In a vibration control device configured in this manner, the support portion of the displacement following member supports the tensile member so that it can move relatively in the axial direction, thereby reducing resistance when the tensile member is displaced and allowing the tensile member to be displaced smoothly.

[0022] In addition, in the vibration control device of the present invention, the support portion may be rotatably arranged around an axis whose axial direction is in the vertical direction relative to the mounting portion, and an insertion hole may be formed therein through which the tension member can be inserted.

[0023] In a seismic control device configured in this manner, the support portion of the displacement tracking member can rotate about an axis whose axial direction is in the vertical direction relative to the mounting portion, thereby responding to displacements in two horizontal directions of the seismic isolation layer. Effect of the Invention

[0024] The seismic control device of the present invention does not act in the deformation areas of the seismic isolation layer caused by seismic motion below a certain magnitude, but only acts in the event of extremely large earthquakes or wind loads that exceed the certain magnitude, thereby suppressing excessive deformation of the seismic isolation layer as a fail-safe. [Brief description of the drawings]

[0025] [Figure 1] 1 is a side view showing a configuration of a vibration damping device according to a first embodiment of the present invention. [Diagram 2] 1 is a plan view showing a configuration of a vibration damping device according to a first embodiment of the present invention. [Diagram 3] FIG. 2A is a plan view showing the configuration of the trunnion member and stopper mechanism of the vibration damping device of the first embodiment of the present invention, and FIG. 2B is a cross-sectional view taken along the line A1-A1 of (a). [Figure 4] 2 is an exploded plan view of a stopper mechanism of the vibration damping device according to the first embodiment of the present invention. FIG. [Diagram 5] FIG. 2A is a perspective view showing the configuration of a trunnion member of the vibration damping device of the first embodiment of the present invention, and FIG. 2B is a perspective view showing the state in which the trunnion member has been rotated. [Figure 6] FIG. 2A is a plan view showing the displacement of the vibration damping device when a compressive force acts on the vibration damper of the first embodiment of the present invention and the vibration damper is displaced in one direction, and FIG. 2B is a plan view showing the displacement of the seismic isolation rubber. [Figure 7] FIG. 2A is a plan view showing the displacement of the vibration damping device when a tensile force acts on the vibration damper of the first embodiment of the present invention and the vibration damper is displaced in one direction, and FIG. 2B is a plan view showing the displacement of the seismic isolation rubber. [Figure 8] 1A is a plan view showing the displacement of a trunnion member when a tensile force acts on the vibration damper of the first embodiment of the present invention and the vibration damper is displaced in one direction, and FIG. 1B is a cross-sectional view taken along the line A2-A2 of FIG. 1A. [Figure 9] 1A is a plan view showing the displacement of the trunnion member when an additional tensile force acts on the vibration damper of the vibration damping device of the first embodiment of the present invention, causing the vibration damper to be displaced in one direction, and FIG. 1B is a cross-sectional view taken along the line A3-A3 of FIG. 1A. [Figure 10] FIG. 2A is a plan view showing the displacement of the vibration damping device when a compressive force acts on the vibration damper of the first embodiment of the present invention and the vibration damper is displaced in two directions, and FIG. 2B is a plan view showing the displacement of the seismic isolation rubber. [Figure 11] FIG. 2A is a plan view showing the displacement of the vibration damping device when a tensile force acts on the vibration damper of the first embodiment of the present invention and the vibration damper is displaced in two directions, and FIG. 2B is a plan view showing the displacement of the seismic isolation rubber. [Figure 12] 1 is a plan view showing the displacement of a trunnion member when a compressive force and a tensile force act on the vibration damper of the first embodiment of the present invention, causing the vibration damper to be displaced in two directions. FIG. [Figure 13] FIG. 4 is a side view showing the configuration of a vibration damping device according to a second embodiment of the present invention. [Figure 14] FIG. 4 is a plan view showing the configuration of a vibration damping device according to a second embodiment of the present invention. [Figure 15] 11 is a plan view showing the configuration of a vibration damping device according to a second embodiment of the present invention, illustrating the state in which the jack is jacked up. FIG. [Figure 16] FIG. 11 is a plan view showing (a) the displacement of the vibration control device and (b) the displacement of the seismic isolation rubber when a compressive force acts on the vibration control device of the second embodiment of the present invention and the vibration control damper is displaced in two directions. [Figure 17] FIG. 11 is a plan view showing (a) the displacement of the vibration control device and (b) the displacement of the seismic isolation rubber when a tensile force acts on the vibration control device of the second embodiment of the present invention and the vibration control damper is displaced in two directions. [Figure 18] FIG. 11 is a side view showing the configuration of a vibration damping device according to a third embodiment of the present invention. [Figure 19] FIG. 11 is a plan view showing the configuration of a vibration damping device according to a third embodiment of the present invention. [Figure 20]FIG. 11 is a plan view showing (a) the displacement of the vibration damping device and (b) the displacement of the seismic isolation rubber when a compressive force acts on the vibration damping device of the third embodiment of the present invention and the seismic isolation layer is displaced in two directions. [Figure 21] FIG. 11 is a plan view showing (a) the displacement of the vibration damping device and (b) the displacement of the seismic isolation rubber when a tensile force acts on the vibration damping device of the third embodiment of the present invention and the seismic isolation layer is displaced in two directions. [Figure 22] 1 shows the analysis results of a comparison of response deformation (Lv2×2.0) during a maximum earthquake using the vibration damping device of the first embodiment of the present invention, where (a) shows the response story deformation and (b) shows the response acceleration. [Figure 23] 4 shows the analysis results of a comparison of response deformation (Lv2×1.0) during a maximum earthquake using the vibration damping device of the first embodiment of the present invention, where (a) shows the response story deformation and (b) shows the response acceleration. [Figure 24] 3 is an image of the restoring force characteristics per one piece of the vibration damping device according to the first embodiment of the present invention. [Diagram 25] 4 shows the load-deformation relationship per pair of left and right poles obtained by a time history response analysis of the vibration damping device of the first embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] First embodiment A vibration damping device according to a first embodiment of the present invention will be described with reference to the drawings. As shown in Fig. 1, the vibration control device 1 according to this embodiment is installed, for example, in a seismic isolation layer 12 of upper and lower structures in the lower part of a building 10. In the seismic isolation layer 12, a seismic isolation rubber 11 is installed between an upper joint 18a provided on an upper structure 18 and a lower joint 19a provided on a lower structure 19.

[0027] The vibration control device 1 comprises a steel damper device 1X and an oil damper (vibration control damper) 2. The steel damper device 1X comprises a tie rod (tensile member) 3, a rotating fixed portion 4, a stopper member (stopper mechanism) 5, and a trunnion member (displacement tracking member) 6. The steel damper device 1X is a so-called gapped steel damper for seismic isolation. The rotating fixed portion 4 and the trunnion member 6 are provided on the tie rod 3, and cause the tie rod 3 to follow the displacement of the oil damper 2 in two horizontal directions. The displacement of the oil damper 2 is the same as the displacement of the seismic isolation layer 12.

[0028] The vibration control device 1 is installed between a column 16a supported by a girder 16 of a lower structure 19 and extending upward, and a column 17a supported by a girder 17 of an upper structure 18 and extending downward.

[0029] The extension direction of the girders 16, 17 is defined as the X direction, and the horizontal direction perpendicular to the X direction is defined as the Y direction.

[0030] 2, the extension direction (axial direction) of the oil damper 2 faces the X direction. The oil damper 2 is disposed between the columns 16a and 17a.

[0031] A joint plate 16b is provided on the column 16a. One end 21 of the oil damper 2 is attached to a damper joint 16c provided on the joint plate 16b. The end 21 of the oil damper 2 is attached to the damper joint 16c so as to be rotatable about an axis whose axial direction is the up-down direction.

[0032] A joint plate 17b is provided on the beam column 17a. The other end 22 of the oil damper 2 is attached to a damper joint 17c provided on the joint plate 17b. The end 22 of the oil damper 2 is attached to the damper joint 17c so as to be rotatable about an axis extending in the vertical direction relative to the damper joint 17c.

[0033] The tie rod 3 is a steel damper. The tie rod 3 is provided in parallel with the oil damper 2. The tie rod 3 has a rod-shaped shaft 30. The length direction of the shaft 30 is parallel to the extension and contraction direction (X direction) of the oil damper 2. A plurality of tie rods 3 are arranged around the oil damper 2. In order to avoid eccentric bending and twisting of the beam columns 16a, 17a, the tie rods 3 are arranged in a balanced manner above and below the oil damper 2 or on both sides in the Y direction (left and right sides). In this embodiment, four tie rods 3 are arranged above and below the oil damper 2 and on both sides in the Y direction.

[0034] One end 31 of the tie rod 3 is attached to the upper and lower tie rod joints 16d provided on the joint plate 16b via a pivot fixing part 4. The end 31 of the tie rod 3 is pin-supported at the tie rod joints 16d. The end 31 of the tie rod 3 is attached to the tie rod joints 16d so as to be rotatable about an axis whose axial direction is the up-down direction.

[0035] The rotation fixing part 4 has a fastening member 162. The tie rod joint 16d is two plate-shaped members, one above the other. The two tie rod joints 16d sandwich the end 31 of the tie rod 3 from above and below. A fastening member 162, whose axial direction is the vertical direction, is inserted into a through hole formed in the two tie rod joints 16d and the end 31 of the tie rod 3. The fastening member 162 joins the tie rod joint 16d and the end 31 of the tie rod 3 to be rotatable around the axial direction of the fastening member 162. As shown in FIG. 10, the tie rod 3 is rotatable around the fastening member 162 with respect to the tie rod joint 16d.

[0036] 3 and 4, a stopper member 5 is provided at the other end 32 of the tie rod 3. The stopper member 5 has an outer nut 51A, an inner nut 51B, a rubber ring 52, a ring washer 53, and a disc spring 54. As shown in Fig. 3, the inner nut 51B, the rubber ring 52, the ring washer 53, the disc spring 54, and the outer nut 51A are arranged in this order from the center side of the axial direction X of the tie rod 3 toward the end 32 side.

[0037] As shown in Fig. 4, an upset is performed on the end 32 of the tie rod 3. The end 32 of the tie rod 3 has a large diameter portion 33 formed to have a larger diameter than the shaft portion 30 of the tie rod 3. A male thread 34 is formed on the end of the large diameter portion 33.

[0038] A tapered portion 35 is formed on the end face of the large diameter portion 33 on the shaft portion 30 side. The tapered portion 35 is an inclined surface that gradually increases in diameter from the shaft portion 30 toward the male thread 34.

[0039] The rubber ring 52 has a seat portion 521 and a rubber ring main body portion (elastic member) 522. The seat portion 521 is formed in a disk shape. A circular hole 523 is formed in the center of the seat portion 521, into which the inner nut 51B can be accommodated and into which the male screw 34 of the tie rod 3 can be inserted. A bolt 526 is attached to the seat portion 521.

[0040] The rubber ring body 522 is formed of a rubber member that is elastically deformable in the axial direction X of the tie rod 3. The rubber ring body 522 is formed in a disk shape with a thickness greater than that of the inner nut 51B. A circular hole 524 having a shape corresponding to the circular hole 523 of the base portion 521 is formed in the center of the rubber ring 52. The inner nut 51B screwed onto the male thread 34 of the tie rod 3 is disposed in the circular hole 524.

[0041] 3, in the normal state (initial setting position where no displacement occurs in the oil damper 2), the rubber ring main body 522 and the trunnion member 6 described below are spaced apart by a distance G in the axial direction. The distance G is a gap that allows displacement of the oil damper 2 in the tensile direction.

[0042] 4, the ring washer 53 is formed in a disk shape. In the center of the ring washer 53, a circular hole 531 is formed through which the male screw 34 of the tie rod 3 can be inserted.

[0043] A plurality of mounting holes 532 are formed on the outer edge side of the ring washer 53, through which the bolts 526 of the rubber ring 52 can be inserted. The bolts 526 are inserted into the mounting holes 532 of the ring washer 53. A washer 527 is inserted into the bolt 526, and a nut 528 is screwed into the bolt 526. This fixes the rubber ring 52 and the ring washer 53. In addition, the rubber ring 52 can be removed from the ring washer 53 after the outer nut 51A and the inner nut 51B are tightened.

[0044] The outer nut 51A is fastened to the male screw 32 via a disc spring 54 between the outer nut 51A and the ring washer 53. By providing the disc spring 54, an axial force is constantly applied to the outer nut 51A, preventing the outer nut 51A from loosening due to co-rotation caused by micro-vibrations and the like, and positioning the outer nut 51A.

[0045] 1, a trunnion member 6 is provided on the shaft portion 30 of the tie rod 3. The trunnion member 6 causes the tie rod 3 to follow the displacement of the oil damper 2 in the X direction and Y direction (two horizontal directions).

[0046] Three joint plates 171 are fixed to the bundle column 17a at a distance in the vertical direction. The trunnion member 6 of the upper tie rod 3 is disposed between the upper joint plate 171 and the vertically intermediate joint plate 171. The trunnion member 6 of the lower tie rod 3 is disposed between the vertically intermediate joint plate 171 and the lower joint plate 171.

[0047] An attachment plate 172 is fixed to a surface of the joining plate 171 facing the other joining plate 171 in the vertical direction. The attachment plate 172 is formed in a plate shape. The plate surface of the attachment plate 172 faces the vertical direction.

[0048] 5(a), the trunnion member 6 has a pin member (mounting portion) 61 and a cylindrical member (support portion) 62. The pin member 61 is attached to a surface of the mounting plate 172 that faces the other mounting plate 172 facing in the vertical direction. The pin member 61 is a rod-shaped member whose axial direction is in the vertical direction.

[0049] The cylindrical member 62 is provided between the upper and lower pin members 61. The upper and lower pin members 61 are arranged coaxially with the cylindrical member 62 in between. As shown in Fig. 5(b) , the upper part of the cylindrical member 62 is attached to the upper pin member 61 so as to be rotatable about the axis of the pin member 61. The lower part of the cylindrical member 62 is attached to the lower pin member 61 so as to be rotatable about the axis of the pin member 61.

[0050] The cylindrical member 62 is a cylindrical member whose axial direction is the horizontal direction. A through hole (insertion hole) 62h is formed inside the cylindrical member 62. As shown in FIG. 3(a), the diameter of the through hole 62h is slightly larger than the diameter of the shaft portion 30 of the tie rod 3. As shown in FIG. 8(a), the diameter of the through hole 62h is approximately the same as the large diameter portion 33 of the tie rod 3. In a normal state, the shaft portion 30 of the tie rod 3 is inserted through the through hole 62h. The cylindrical member 62 supports the tie rod 3 so as to be relatively movable in the axial direction (X direction).

[0051] 3(a), a tapered opening 62t is formed at the opening of the through hole 62h facing the stopper member 5. The tapered opening 62t is an inclined surface that gradually increases in diameter from the center of the through hole 62h in the X direction toward the opening edge.

[0052] The separation distance (gap) G between the rubber ring main body 522 of the stopper member 5 and the opposing surface (surface facing the stopper member 5) 62a of the tubular member 62 of the trunnion member 6 in the normal state can be adjusted according to the tightening positions of the outer nut 51A and the inner nut 51B.

[0053] Next, the operation of the vibration control device 1 will be described. In the initial setting position (position where no seismic force is applied) F shown in FIGS. 1 and 2, the distance between the rubber ring main body 522 of the stopper member 5 and the trunnion member 6 is a distance G.

[0054] A case where a force is applied and the oil damper 2 is displaced in one direction (X direction) will be described. When a compressive force in the X direction (a force in a direction that brings the beam columns 16a and 17a closer to each other) acts on the vibration control device 1, the oil damper 2 is displaced so as to shorten its overall length (the distance between the end 21 and the end 22) as shown in Fig. 6. Accordingly, the shaft portion 30 of the tie rod 3 slides inside the through hole 62h of the cylindrical member 62 of the trunnion member 6, and the cylindrical member 62 of the trunnion member 6 is displaced in a direction approaching the rotating fixed portion 4.

[0055] When a tensile force in the X direction (a force in a direction separating the beam columns 16a and 17a) acts on the vibration control device 1, the oil damper 2 is displaced so that its overall length (the distance between the end 21 and the end 22) becomes longer, as shown in Fig. 7. Accordingly, the shaft portion 30 of the tie rod 3 slides inside the through hole 62h of the cylindrical member 62 of the trunnion member 6, and the cylindrical member 62 of the trunnion member 6 is separated from the rotation fixing portion 4 and displaced in a direction approaching the stopper member 5.

[0056] 8, a tapered portion 35 is formed on the end face of the large diameter portion 33 of the tie rod 3, and a tapered opening 62t is formed in the through hole 62h of the tubular member 62 of the trunnion member 6. As a result, when the large diameter portion 33 of the tie rod 3 enters the through hole 62h of the tubular member 62 of the trunnion member 6, the large diameter portion 33 of the tie rod 3 smoothly enters without getting caught in the through hole 62h of the tubular member 62, and the large diameter portion 33 of the tie rod 3 smoothly slides inside the through hole 62h of the tubular member 62.

[0057] When the tensile force in the X direction on the vibration damping device 1 becomes even greater (the oil damper 2 is displaced by a predetermined amount in the tensile direction), the rubber ring body 522 of the rubber ring 52 comes into contact with the opposing surface 62a of the cylindrical member 62.

[0058] As shown in FIG. 9, when the tensile force becomes even greater (when the oil damper 2 is displaced in the tensile direction by more than a predetermined amount), the rubber ring main body 522 is compressed and deformed in the X direction, the gap G disappears, and the rubber ring main body 522 functions as a stopper that suppresses the displacement of the trunnion member 6.

[0059] Next, a case where a force is applied and the oil damper 2 is displaced in two directions (X direction and Y direction) will be described. When compressive forces in the X and Y directions act on the vibration control device 1, the oil damper 2 is displaced so as to shorten its overall length and is tilted with respect to the X direction, as shown in Fig. 10. Accordingly, the shaft portion 30 of the tie rod 3 slides inside the through hole 62h of the cylindrical member 62 of the trunnion member 6, and the cylindrical member 62 of the trunnion member 6 is displaced in a direction approaching the rotation fixed portion 4.

[0060] 12, the cylindrical member 62 of the trunnion member 6 rotates around the axis of the pin member 61. The inclination angle of the tie rod 3 inserted into the through hole 62h of the cylindrical member 62 with respect to the X direction is substantially the same as the inclination angle of the oil damper 2 with respect to the X direction.

[0061] When tensile forces in the X and Y directions act on the vibration damping device 1, the oil damper 2 is displaced so as to increase in overall length and is tilted with respect to the X direction, as shown in Fig. 11. Accordingly, the shaft portion 30 of the tie rod 3 slides in the through hole 62h of the cylindrical member 62 of the trunnion member 6, and the cylindrical member 62 of the trunnion member 6 moves away from the rotation fixing portion 4 and is displaced in a direction approaching the stopper member 5. The inclination angle of the tie rod 3 inserted in the through hole 62h of the cylindrical member 62 with respect to the X direction is substantially the same as the inclination angle of the oil damper 2 with respect to the X direction. When the tensile force becomes even larger (the oil damper 2 is displaced by a predetermined amount in the tensile direction), the rubber ring main body portion 522 of the rubber ring 52 comes into contact with the opposing surface 62a of the cylindrical member 62.

[0062] As shown by the dotted line in Figure 12, when the tensile force becomes even larger (the oil damper 2 is displaced in the tensile direction by more than a predetermined amount), the rubber ring main body 522 is compressed and deformed, the gap G disappears, and it functions as a stopper that suppresses the displacement of the trunnion member 6.

[0063] In the seismic control device 1 configured in this manner, in the event of an extremely large earthquake or wind load exceeding a predetermined magnitude, the stopper member 5 comes into contact with the trunnion member 6 as a fail-safe, and the gap G between the stopper member 5 and the trunnion member 6 disappears. This adds rigidity and strength to the tie rod 3, suppressing the deformation of the seismic isolation layer to below the limit deformation, preventing buckling of the laminated rubber installed in the seismic isolation layer 12, the falling off of the seismic isolation layer 12, and collision with the retaining wall, thereby suppressing excessive deformation of the seismic isolation layer 12.

[0064] Furthermore, in the case of seismic motion below a certain magnitude, the distance between the stopper member 5 and the trunnion member 6 does not disappear (becomes less than the gap amount), and the seismic control device 1 does not bear the load, so the seismic isolation effect can be exerted as usual without impeding the long-period and energy absorption caused by seismic isolation.

[0065] In addition, in the event of an extremely large earthquake or wind load exceeding a specified magnitude, when the stopper member 5 abuts against the trunnion member 6, the rubber ring 52 elastically deforms and is compressed, thereby suppressing damage to the stopper member 5 and the trunnion member 6.

[0066] In addition, since the oil damper 2 is installed in parallel with the tie rod 3, the seismic isolation effect against earthquakes and wind loads can be improved.

[0067] In addition, the trunnion member 6 causes the tie rod 3 to follow the horizontal displacement of the oil damper 2 in two directions, so that it can smoothly respond to deformation of the seismic isolation layer 12.

[0068] Furthermore, since the cylindrical member 62 of the trunnion member 6 supports the tie rod 3 so as to be relatively movable in the axial direction, resistance when the tie rod 3 is displaced is suppressed, allowing the tie rod 3 to be displaced smoothly.

[0069] Furthermore, the cylindrical member 62 of the trunnion member 6 can rotate about an axis whose axial direction is in the vertical direction relative to the pin member 61, and can accommodate displacement of the oil damper 2 in two horizontal directions.

[0070] Furthermore, the tie rod 3 is attached to the support columns 16a, 17a to which the oil damper 2 is attached. Therefore, there is no need to install a separate column or the like for attaching the tie rod 3, and space can be saved.

[0071] Moreover, by allowing only tensile forces to act on the tie rods 3, no buckling stiffener against compression is required, making it possible to make the device more compact.

[0072] In addition, generally, a single oil damper with high strength often has a strength higher than the maximum capacity of the testing machine, making the shipping test itself difficult and performance assurance difficult. In this embodiment, the strength of the entire vibration control device 1 is increased by arranging multiple tie rods 3 in parallel, so that shipping tests can be carried out on the oil dampers 2 individually, realizing a high-strength damper whose performance can be easily assured.

[0073] In addition, since the vibration control device 1 requires a small installation space, it can be added to an existing seismic isolation oil damper by simply reinforcing the connection parts, along with the tie rod 3, pivot fixing part 4, stopper member 5, and trunnion member 6. Therefore, it can also be used to renovate existing seismic isolated buildings.

[0074] Second Embodiment Next, a vibration damping device according to a second embodiment will be described mainly with reference to Figures 13 to 17. In the description of the embodiment shown below, the same members as those described above are given the same reference numerals, and the description thereof will be omitted.

[0075] As shown in Fig. 13, the vibration control device 1A includes a steel damper device 1X, an oil damper (vibration control damper) 2, and a center hole jack (jack) 7. The steel damper device 1X includes a tie rod (tension member) 3, a rotation fixing part 4, a stopper member (stopper mechanism) 5, and a trunnion member (displacement tracking member) 6. The center hole jack 7 restores the residual deformation of the seismic isolation layer 12.

[0076] As shown in Fig. 14, the center hole jack 7 is, for example, a hydraulic jack. The center hole jack 7 has a jack body 71 formed in a substantially cylindrical shape, and a support part 72 extending in the X direction from the jack body 71. A through hole is formed in the jack body 71 and the support part 72 in the X direction. The shaft part 30 of the tie rod 3 is inserted into the through hole so as to be slidable in the X direction. For example, the jack body 71 is fixed inside a through hole (not shown) of a cylindrical member 62 of the trunnion member 6.

[0077] As shown in Figure 15, when the center hole jack 7 is jacked up, the rubber ring main body 522 (see Figure 8) of the rubber ring 52 of the stopper member 5 abuts against the support part 72 of the center hole jack 7. The rubber ring main body 522 is compressed and deformed in the X direction, eliminating the gap G and functioning as a stopper that suppresses the displacement of the trunnion member 6. During frequent strong winds such as typhoons, the center hole jack 7 is jacked up to act as a stopper, fixing the seismic isolation layer 12 and also functioning as a wind-resistant locking device that suppresses deformation of the seismic isolation layer due to wind swaying.

[0078] 14, in the normal state (initial setting position where no displacement occurs in the oil damper 2), there is a distance G1 in the axial direction between the rubber ring body 522 and the support part 72 of the center hole jack 7. The distance G1 is a gap that allows displacement of the oil damper 2 in the tensile direction.

[0079] 16, when compressive forces in the X and Y directions act on the vibration control device 1A, the oil damper 2 is displaced so as to shorten its overall length and is tilted with respect to the X direction. Accordingly, the shaft portion 30 of the tie rod 3 slides in the through holes of the jack body 71 and the support portion 72, and the cylindrical member 62 of the trunnion member 6 is displaced in a direction approaching the rotation fixed portion 4.

[0080] The cylindrical member 62 of the trunnion member 6 rotates around the axis of the pin member 61. The inclination angle of the tie rod 3 with respect to the X direction is substantially the same as the inclination angle of the oil damper 2 with respect to the X direction.

[0081] As shown in FIG. 17, when tension forces in the X and Y directions act on the vibration control device 1A, the oil damper 2 is displaced so that its overall length increases and is inclined with respect to the X direction. Accordingly, the shaft portion 30 of the tie rod 3 slides in the through holes of the jack body 71 and the support portion 72, and the cylindrical member 62 of the trunnion member 6 moves away from the rotation fixing portion 4 and is displaced in a direction approaching the stopper member 5. The inclination angle of the tie rod 3 with respect to the X direction is approximately the same as the inclination angle of the oil damper 2 with respect to the X direction. When the tension force becomes even larger (the oil damper 2 is displaced by a predetermined amount in the tension direction), the support portion 72 of the center hole jack 7 abuts against the rubber ring main body portion 522 of the stopper member 5. When the tension force becomes even larger (the oil damper 2 is displaced by a predetermined amount or more in the tension direction), the rubber ring main body portion 522 is compressed and deformed, the gap G1 disappears, and the rubber ring main body portion 522 functions as a stopper that suppresses the displacement of the trunnion member 6.

[0082] In the seismic isolation device 1A configured in this manner, in the event of an extremely large earthquake or wind load exceeding a predetermined magnitude, the stopper member 5 comes into contact with the support portion 72 of the center hole jack 7 as a fail-safe, and the gap G1 between the stopper member 5 and the support portion 72 of the center hole jack 7 disappears. This adds rigidity and strength to the tie rod 3, suppressing the seismic isolation layer deformation to below the limit deformation, and preventing buckling of the laminated rubber installed in the seismic isolation layer 12, the fall-off of the seismic isolation layer 12, and collision with the retaining wall, thereby suppressing excessive deformation of the seismic isolation layer 12.

[0083] Furthermore, in the case of seismic motion below a certain magnitude, the distance between the stopper member 5 and the support part 72 of the center hole jack 7 does not disappear (becomes less than the gap amount), and the seismic control device 1A does not bear the load, so the seismic isolation effect can be exerted as usual without impeding the long-period and energy absorption caused by seismic isolation.

[0084] Furthermore, when a tensile force acts on the seismic isolation device 1A, the residual deformation of the seismic isolation layer 12 can be restored to its original position via the tie rod 3 by the pressing force of the center hole jack 7.

[0085] Third embodiment Next, a vibration damping device according to a third embodiment will be described mainly with reference to Figs. As shown in Fig. 18, the vibration control device 1B includes a steel damper device 1X and a center hole jack (jack) 7. The steel damper device 1X includes a tie rod (tension member) 3, a rotation fixing part 4, a stopper member (stopper mechanism) 5, and a trunnion member (displacement tracking member) 6. The center hole jack 7 restores the residual deformation of the seismic isolation layer 12.

[0086] 19, the shaft portion 30 of the tie rod 3 is inserted into a through hole formed in the jack body 71 and the support portion 72 of the center hole jack 7 so as to penetrate in the X direction, and is slidable in the X direction. The jack body 71 is fixed inside a through hole (not shown) of the cylindrical member 62 of the trunnion member 6.

[0087] 20, when compressive forces in the X and Y directions act on the vibration control device 1B, the tie rod 3 tilts with respect to the X direction, the shaft portion 30 of the tie rod 3 slides inside the through holes of the jack body 71 and the support portion 72, and the cylindrical member 62 of the trunnion member 6 is displaced in a direction approaching the rotating fixed portion 4. The cylindrical member 62 of the trunnion member 6 rotates around the axis of the pin member 61.

[0088] 21, when tensile forces in the X and Y directions act on the vibration control device 1B, the tie rod 3 tilts with respect to the X direction, the shaft portion 30 of the tie rod 3 slides inside the through holes of the jack body 71 and the support portion 72, and the cylindrical member 62 of the trunnion member 6 moves away from the rotating fixed portion 4 and is displaced in a direction approaching the stopper member 5. When the tensile force becomes even larger, the support portion 72 of the center hole jack 7 comes into contact with the rubber ring main body portion 522 of the stopper member 5. When the tensile force becomes even larger, the rubber ring main body portion 522 is compressed and deformed, the gap G1 disappears, and the rubber ring main body portion 522 functions as a stopper that suppresses the displacement of the trunnion member 6.

[0089] In the seismic isolation device 1B configured in this manner, in the event of an extremely large earthquake or wind load exceeding a predetermined magnitude, the stopper member 5 comes into contact with the support portion 72 of the center hole jack 7 as a fail-safe, and the gap G1 between the stopper member 5 and the support portion 72 of the center hole jack 7 disappears. This adds rigidity and strength to the tie rod 3, suppressing the seismic isolation layer deformation to below the limit deformation, and preventing buckling of the laminated rubber installed in the seismic isolation layer 12, the fall-off of the seismic isolation layer 12, and collision with the retaining wall, thereby suppressing excessive deformation of the seismic isolation layer 12.

[0090] Furthermore, in the case of seismic motion below a certain magnitude, the distance between the stopper member 5 and the support part 72 of the center hole jack 7 does not disappear (becomes less than the gap amount), and the seismic control device 1B does not bear the load, so the seismic isolation effect can be exerted as usual without impeding the long-period seismic isolation or energy absorption.

[0091] Furthermore, when a tensile force acts on the seismic isolation device 1B, the residual deformation of the seismic isolation layer 12 can be restored to its original position via the tie rod 3 by the pressing force of the center hole jack 7.

[0092] Next, the effect of installing the seismic control device 1 described above was confirmed by time history response analysis for an analytical model of a building having a seismic isolation layer.

[0093] The natural period of the model building is approximately 1.5 seconds when fixed. The building has a seismic isolation period of approximately 5.0 seconds at 200% strain, and is made up of natural rubber laminates, lead plug laminated rubber, and eight oil dampers (per direction). Four tie rods 3 are installed per oil damper, for a total of 32 (per direction). Here, as this device (seismic control device 1) only acts in tension, only 16 of them actually bear the load.

[0094] In Figures 22 and 23, "with gapped steel damper" is the vibration control device 1 described above, and "without gapped steel damper" (a configuration equipped with an oil damper 2, and without a tie rod 3, pivot fixed portion 4, stopper member 5, and trunnion member 6) and "seismic isolation clearance (retaining wall collision)" are shown as comparative examples. As shown in Figure 22, a comparison of the presence and absence of this device (vibration control device 1) for an input of 2.0 times the Kobe Level 2 notified is performed, and while the maximum deformation before installation was approximately 700 mm, after installation the deformation was suppressed to approximately 650 mm or less, confirming a deformation reduction effect of approximately 50 mm. However, the response acceleration increases after installation.

[0095] On the other hand, as shown in FIG. 23, at 1.0 times input of Lv2, this device (seismic control device 1) does not work and does not impair the seismic isolation performance.

[0096] In addition, Fig. 24 shows an image of the restoring force characteristics of this device with a gap displacement of 550 mm. Fig. 25 shows the actual history (expressed as a pair of left and right) obtained by response analysis.

[0097] The shapes and combinations of the components shown in the above-described embodiment are merely examples, and various modifications can be made based on design requirements, etc., without departing from the spirit of the present invention.

[0098] For example, the vibration control device of the third embodiment may not have the center hole jack 7. In this case, the trunnion member 6 has the same configuration as in the first embodiment and is attached to the mounting plate 172 provided on the column 17a. In the event of an extremely large earthquake or wind load exceeding a predetermined magnitude, the stopper member 5 comes into contact with the trunnion member 6 as a fail-safe, and the gap G between the stopper member 5 and the trunnion member 6 disappears. This adds rigidity and strength to the tie rod 3, suppressing the seismic isolation layer deformation to below the limit deformation, and avoiding buckling of the laminated rubber installed in the seismic isolation layer 12, the fall-off of the seismic isolation layer 12, and collision with the retaining wall, thereby suppressing excessive deformation of the seismic isolation layer 12. In addition, in the event of earthquake motion below a predetermined magnitude, the distance between the stopper member 5 and the trunnion member 6 does not disappear (becomes below the gap amount), and the vibration control device 1 does not bear the load, so that the seismic isolation effect can be exhibited as usual without hindering the long period and energy absorption due to seismic isolation. [Explanation of symbols]

[0099] 1,1A,1B Vibration control device 1X Steel Damper Device 2. Vibration dampers 3 Tie rod (tensile material) 5 Stopper member (stopper mechanism) 6 Trunnion member (displacement tracking member) 7 Center hole jack (jack) 12 Seismic isolation layer 18 Superstructure 19 Undercarriage 61 Pin member (mounting part) 62 Cylindrical member (support part) 62h Through hole (insertion hole) 522 Rubber ring body (elastic member)

Claims

1. A seismic control device installed in a seismic isolation layer between the structural members of a building, A tension member connected between the structural members of the building and arranged in a substantially horizontal direction; a displacement following member that causes the tension member to follow the displacement of the seismic isolation layer; A stopper mechanism provided on the tension member, A seismic control device in which the stopper mechanism abuts against the displacement following member when the seismic isolation layer is displaced a predetermined amount in the tensile direction.

2. The stopper mechanism has an elastic member that is elastically deformable in an axial direction of the tension member, 2. The vibration control device according to claim 1, wherein the elastic member abuts against the displacement following member and elastically deforms when the seismic isolation layer is displaced in the tensile direction by a predetermined amount or more.

3. A seismic control device installed in a seismic isolation layer between the structural members of a building, tension members connected between the building structures; a displacement following member that causes the tension member to follow the displacement of the seismic isolation layer; A stopper mechanism provided on the tension member, When the seismic isolation layer is displaced by a predetermined amount in a tensile direction, the stopper mechanism comes into contact with the displacement following member, The stopper mechanism has an elastic member that is elastically deformable in an axial direction of the tension member, The elastic member is a seismic control device that elastically deforms by abutting against the displacement following member when the seismic isolation layer is displaced in the tensile direction by more than a predetermined amount.

4. A seismic control device installed in a seismic isolation layer between the structural members of a building, tension members connected between the building structures; a displacement following member that causes the tension member to follow the displacement of the seismic isolation layer; A stopper mechanism provided on the tension member; A jack for restoring the residual deformation of the seismic isolation layer, The displacement following member is attached to the jack, A seismic control device in which the stopper mechanism abuts against the jack when the seismic isolation layer is displaced a predetermined amount in the tensile direction.

5. The stopper mechanism has an elastic member that is elastically deformable in an axial direction of the tension member, 5. The vibration control device according to claim 4, wherein the elastic member abuts against the jack and elastically deforms when the seismic isolation layer is displaced in the tensile direction by a predetermined amount or more.

6. A seismic damper is connected between the structural members of the building, The vibration control device according to claim 1 , wherein the tension member is provided in parallel with the vibration damper.

7. The seismic control device according to claim 1 , wherein the displacement tracking member causes the tension member to follow the displacements of the seismic isolation layer in two horizontal directions.

8. The displacement following member is A mounting portion connected to the structure; The vibration damping device according to claim 1 , further comprising: a support portion provided on the mounting portion and supporting the tension member so as to be movable relatively in an axial direction of the tension member.

9. The vibration damping device according to claim 8, wherein the support portion is rotatably arranged about an axis whose axial direction is in the vertical direction relative to the mounting portion, and an insertion hole through which the tension member can be inserted is formed therein.

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