JP2003020612A - Vibration control device, vibration control support structure, and bridge fall preventing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact vibration control device with the simple structure and easy to be fitted to an existing structure and capable of absorbing the energy regardless of the direction of a relative movement. SOLUTION: A cylindrical rubber body 64 is arranged between a cylindrical outer tube 46 to be fitted to a girder 16 and a cylindrical inner tube 56 to be fitted to a pier 12, and adhered to the outer tube 46 and the inner tube 56 by vulcanization. The outer tube 46 and the inner tube 56 are relatively displaced in the horizontal direction by the vibration transmitted from the girder 16 to the pier 12, and the rubber body 64 is deformed to absorb the energy and prevent a fall of the girder 16 from the pier 12. Fitting is facilitated by only fitting the outer tube 46 and the inner tube 56 to the girder 16 or the pier 12, and fitting to an existing bridge is possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control device, a vibration control support structure, and a bridge collapse prevention device.

[0002]

2. Description of the Related Art A bridge bridge that supports upper structures such as bridge girders with lower structures such as piers and abutments via bearings and prevents the upper structures from falling from the lower structures when an earthquake occurs. Various prevention devices have been conventionally proposed.

For example, in the bridge fall prevention device shown in FIG. 8, two connecting plates 114 are bridged between the bridge girders 112, and these connecting plates 114 are connected by bolt-like connecting pins 116. Due to the relative movement of the bridge girder 112, the connecting plate 114 and the coupling pin 116 collide with each other to limit this relative movement within a certain range, and prevent the bridge girder 112 from falling.

However, the connecting pin 116 is required to have a predetermined rigidity so as not to be damaged even when an impact force is applied, and the structure of the bridge prevention device may be large.

On the other hand, a connector 120 shown in FIG. 9 has been proposed (see Japanese Patent Laid-Open No. 9-88010). In this connecting tool 120, a chain 124 is embedded in a curved rubber body 122, and the exposed portion of the chain 124 is used to make the girder 12
The bracket 130 of 6 is connected by a pin 130. In the bridge prevention device using this connecting tool 120, there is no risk of damage to the rubber body 122 and the chains 124, and the energy of relative movement can be reliably absorbed by the elastic deformation of the rubber body 122 to prevent the girder 126 from falling. .

However, in this fall prevention device, the movement amount of the girder 126 may increase when the bearing is destroyed due to an earthquake or the like. Generally, since the upper surface of the girder 126 is often used as a road or railroad track, the girder 12
If the relative displacement between the six becomes large, traffic may be hindered.

Further, because of the structure of the connecting tool 120, the girder 12 is used.
6 Since the energy absorption ability in the direction in which the six come close to each other (the direction opposite to the arrow A) is relatively low, in order to ensure that the energy can be absorbed also in this direction, the connector 1
20 must be oversized or another device must be juxtaposed.

Further, as a bridge prevention device different from the one described above, a device shown in FIG. 10 has also been proposed.

In this bridge fall prevention device, a damper 146 is housed in a housing recess 144 formed in a portion facing the bridge girder 142. An anchor bar 148 arranged in the center of the damper 146 is embedded in the pier 150,
Elastic pads 152 laminated on both sides of the bridge 48
It is designed to be pushed from the side. When the elastic pad 152 is moved relative to the bridge girder 142, the elastic pad 152 is compressed (see the elastic pad 152 on the left side of FIG. 10B), and energy is absorbed.

However, in this fall prevention device, it is difficult to apply the anchor bar 148 to the existing pier because the anchor bar 148 must be deeply embedded in the pier 150. Also,
Due to the structure of the damper 146, energy cannot be absorbed when the bridge girders 142 move in the direction in which they are separated from each other.

[0011]

In consideration of the above facts, the present invention has a small and simple structure, can be easily attached to an existing structure, and can absorb energy regardless of the direction of relative movement. And, it is an object to obtain a vibration control support structure and a bridge prevention device using this vibration control device.

[0012]

According to a first aspect of the present invention, an outer member formed in a substantially tubular shape and fixed to either one of an upper structure and a lower structure, an upper structure and a lower structure. Of the inner member fixed to the other of the outer member, the inner member being arranged so as to overlap the outer member when viewed in the horizontal direction, and the entire circumference of the outer member between the inner member and the outer member. An elastic body that is disposed in contact with the inner member and the outer member and that elastically deforms due to relative displacement of the inner member and the outer member in the horizontal direction.

That is, in this vibration control device, when the upper structure and the lower structure move relative to each other, the inner member also moves relative to the outer member inside the outer member. Here, the inner member is arranged so as to overlap the outer member when viewed in the horizontal direction, and the elastic body is arranged between the inner member and the outer member. The elastic body is in contact with the inner member and the outer member, and is elastically deformed by the relative displacement of the inner member and the outer member in the horizontal direction, so that the energy of the relative movement between the upper structure and the lower structure is absorbed. . Moreover, since the elastic body is in contact with the inner member and the outer member over the entire circumference of the outer member, if the direction of relative movement between the upper structure and the lower structure has a horizontal component, the omnidirectional Can absorb energy.

Moreover, as the vibration control device, only the elastic body is arranged between the outer member and the inner member, so that the structure can be made small and simple. The outer member and the inner member may be fixed to the structure (upper structure or lower structure) (for example, fixing by bolts or fixing by welding can be adopted), and it is not necessary to deeply bury them in the structure as in the past. Absent. Therefore, the damping device of the present invention can be applied to an existing structure.

The above "upper structure" and "lower structure" are not particularly limited, but for example, "upper structure".
Includes bridge girders, etc., and as the "substructure",
Includes piers and abutments.

The elastic body can absorb energy by compressive deformation by merely contacting the inner member and the outer member. However, as described in claim 2, the elastic body can absorb the energy. On the other hand, in the configuration in which the elastic body is fixed over the entire circumference, the elastic body further undergoes tensile deformation, shear deformation, and combined deformation thereof, so that energy can be absorbed more effectively.

With respect to the shapes of the outer member and the inner member, as described in claim 3, the outer member is formed in a cylindrical shape, and the inner member is formed in a cylindrical shape or a cylindrical shape. Then, the outer member can be arranged in all directions in a simple shape and outside the inner member.

Further, in the invention described in claim 3,
When the outer member and the inner member are arranged concentrically as described in claim 4, the distance between the inner surface of the outer member and the outer surface of the inner member becomes constant in all directions, The thickness of the elastic body can be constant in all directions.
This makes it possible to absorb energy evenly in all directions.

According to a fifth aspect of the present invention, in the invention according to the third or fourth aspect, the axial length of the outer member and the axial length of the inner member are substantially the same, and the respective axes are the same. The outer member and the inner member are arranged so as to overlap each other when viewed in the horizontal direction over substantially the entire length of the direction.

Therefore, the elastic body can be deformed over substantially the entire axial direction without producing a useless space in the axial direction.

According to a sixth aspect of the invention, in the fifth aspect of the invention, the elastic body is formed in a cylindrical shape, and the formula K = π (E _ap + G) H / log _e (r ₂ / r ₁ (However, the apparent Young's modulus E _ap is the shape ratio S, E _ap = (4 + 3.29S ² ) G The shape ratio S is S = H / (r1 + r2) / log _e (r ₂ / r ₁ )) The inner diameter r ₁ , outer diameter r ₂ , axial length H, apparent Young's modulus E _ap , and lateral elastic modulus G are set so that the axial right angle spring constant K is within a predetermined range. It is characterized by being.

As a result, the relative displacement amount between the upper structure and the lower structure can be surely kept within a certain range.

According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects, at least one of the outer member and the inner member is attached to a structure. It is characterized by having a flange.

The outer member and / or the inner member can be easily attached to a structure (upper structure and lower structure) through the mounting flange.

According to the invention described in claim 8, between the upper structure and the lower structure, a bearing for supporting the load of the upper structure and between the upper structure and the lower structure are supported. The vibration damping device according to any one of claims 1 to 7, which is arranged.

That is, the upper structure is
It is supported by the substructure. Since the damping device according to any one of claims 1 to 7 is arranged between the upper structure and the lower structure, the direction of relative movement between the upper structure and the lower structure is horizontal. If it has a directional component, energy can be absorbed in all directions.

In the invention according to claim 9, the upper structure is a bridge girder and the lower structure is a bridge pier or abutment,
The damping support structure according to claim 8 is provided between the bridge or bridge girder and the pier or abutment.

That is, between the bridge girder and the pier or abutment,
The vibration control support device according to claim 8 is provided, and the bridge girder is supported by the pier or abutment via the support according to claim 8.

According to claim 1, between the bridge girder and the pier or abutment.
Since the vibration control device according to any one of claims 7 to 8 is arranged, if the direction of relative movement between the upper structure and the lower structure has a horizontal component, energy absorption in all directions. it can.

[0030]

1 and 2 show a bridge 10 to which a fall prevention device 68 according to an embodiment of the present invention is applied.

The bridge 10 has a plurality of bridge piers (or abutments) 12 erected from the ground. A fixed bearing 14 or a movable bearing 15 is fixed at a predetermined position on the upper surface of the bridge pier 12, and these bearings 14 and 15 support a bridge girder 16. Note that the number of fixed bearings 14 and movable bearings 15, the arrangement positions, and the like are determined in consideration of the overall configuration of the bridge 10, site conditions, and the like, as in the conventional case. Further, in FIG. 1, for convenience of illustration, the bridge 10 configured by only one bridge girder 16 is shown, but a plurality of bridge girders 16 are arranged in the longitudinal direction,
The bridge 10 may be configured as a whole.

As shown in FIG. 2, the bridge girder 16 is composed of a pair of main girders 18 arranged on the left and right in the width direction and a transverse girder 20 arranged between the main girders 18.

The movable bearing 15 is, as shown in FIG. 3, an intermediate part of a side isosceles trapezoidal shape located between the upper shoe 24 and the lower shoe 26 having a substantially rectangular shape and the upper shoe 24 and the lower shoe 26. 28. The intermediate portion 28 is made of an elastically deformable material, and by deforming the intermediate portion 28, the upper shoe 24 and the lower shoe 26 are relatively movable.

From the upper shoe 24, a pair of protrusions 30 is provided on the left and right sides, respectively, and an accommodating portion 32 is formed between the pair of protrusions 30. In this accommodation part 32,
Side ribs 34 are provided upright from the lower shoe 26. There is a predetermined space between the housing portion 32 and the side ribs 34, and the relative movement between the upper shoe 24 and the lower shoe 26 is limited to a predetermined range by the side ribs 34 hitting the inner surface of the housing portion 32. . Therefore, the amplitude of vibration of the bridge girder 16 supported by the bearing 14 with respect to the bridge pier 12 is also limited to a predetermined range.

From the lower shoe 26, the mounting plate portion 3 is directed laterally.
6 is projected, an anchor bolt (not shown) projected from the upper surface of the pier 12 is inserted into a mounting hole 38 formed in the mounting plate portion 36, and the support 14 is fixed to the pier 12. There is.

The center of the upper shoe 24 is reinforced by forming a thick portion 40 thicker than both ends, and a cylindrical engaging projection 42 is projected upward from the center of the thick portion 40. Has been done. When the bridge girder 16 is placed on the bearing 14 fixed to the bridge pier 12, the engagement protrusions 42 engage with the engagement holes (not shown) formed in the bottom surface of the main girder 18 to support the bridge girder 16. The horizontal shift with respect to 14 is limited.

On the other hand, in the fixed bearing 14, the upper shoe and the lower shoe are integrally connected so that they do not move relative to each other in the horizontal direction.

As shown in FIG. 4, on the upper surface of the pier 12 to which the movable bearing 15 is fixed, a vibration control device 44 is fixed at the center in a front view.

As shown in FIG. 5, the vibration control device 44 has an outer cylinder 46 formed in a cylindrical shape. A mounting flange 48 is formed radially outward from the upper end of the outer cylinder 46, and a plurality of mounting holes 50 are formed in the mounting flange 48 at regular intervals along the circumferential direction.
As shown in FIG. 4, in the outer cylinder 46, after the sole plate 52 is interposed between the mounting flange 48 and the bridge girder 16,
Further, a mounting bolt 54 is inserted through the mounting hole 50 and fixed to the bridge girder 16. In FIG. 4, for convenience of illustration,
Illustration of some of the mounting bolts 54 is omitted.

Inside the outer cylinder 46, an inner cylinder 56 having an outer diameter smaller than the inner diameter of the outer cylinder 46 is arranged concentrically with the outer cylinder 46. A mounting flange 58 is formed from the lower end of the inner cylinder 56 toward the inside in the radial direction. Mounting flange 5
A mounting hole 60 is formed in the center of the plate 8. Inner cylinder 56
Is attached to a mounting plate 62 by inserting a mounting bolt (not shown) into the mounting hole 60. Mounting plate 6
2 is fixed to the pier 12 by welding, and the inner cylinder 5
6 is fixed to the pier 12 via a mounting plate 62.

As can be seen from FIG. 5B, the outer cylinder 46 and the inner cylinder 56 are formed to have substantially the same length in the axial direction (vertical direction), and when viewed in the horizontal direction, The outer cylinder 46 and the inner cylinder 56 overlap each other over substantially the entire area in the direction.

A substantially cylindrical rubber body 64 is arranged between the outer cylinder 46 and the inner cylinder 56, and is vulcanized and bonded to the outer cylinder 46 and the inner cylinder 56. As shown in detail in FIG. 7, the rubber body 6
The length L of 4 is substantially equal to the axial length of the overlapping portion when the outer cylinder 46 and the inner cylinder 56 are viewed in the horizontal direction.
The inner diameter r1 and the outer diameter r2 of the rubber body 64 are substantially equal to the outer diameter of the inner cylinder 56 and the inner diameter of the outer cylinder 46, respectively.
The thickness of the rubber body 64 is constant in all directions.

As shown in FIG. 6, when the outer cylinder 46 and the inner cylinder 56 relatively move in the horizontal direction (direction orthogonal to the axial direction), the rubber body 64 is compressed, deformed, and pulled in accordance with its position. Deformation, shear deformation, or a combination of these occurs (for example, at a portion 64A where the inner surface of the outer cylinder 46 and the outer surface of the inner cylinder 56 approach each other, the rubber body 64 is mainly compressed and deformed, and the rubber body 64 is deformed. The rubber body 64 mainly undergoes tensile deformation at a portion 64B where the inner surface and the outer surface of the inner cylinder 56 are separated from each other, and at a portion 64C where the inner surface of the outer cylinder 46 and the outer surface of the inner cylinder 56 are horizontally displaced from each other. , The rubber body 64 mainly undergoes shear deformation). Further, the outer cylinder 46, the inner cylinder 56 and the rubber body 64.
Are symmetrically arranged with respect to the central axis C, the rubber body 64 is similarly deformed regardless of the azimuth in any horizontal plane.

The above-mentioned bearings (fixed bearing 14 and movable bearing 15) and the vibration control device 44 constitute a vibration control support structure 66 according to the present embodiment. The bridge prevention device 6 according to the present embodiment is provided between the bridge girder 16 and the bridge pier 12 (or abutment).
8 are configured.

Next, the operation of the vibration control device 44, the vibration control support structure 66 and the bridge prevention device 68 of this embodiment will be described.

As shown in FIGS. 1 and 2, the bridge girder 16 is
The bridge girder 16 is supported by bearings 14 and 15 fixed to the pier 12, and in the normal state, the bridge girder 16 does not inadvertently move in the horizontal direction with respect to the pier 12. Also,
At this time, as shown in FIGS. 5A and 5B, the outer cylinder 46 and the inner cylinder 56 of the vibration control device 44 are concentric, and the rubber body 64 is not deformed.

When the bridge pier 12 rolls (sways including a horizontal component) due to an earthquake or the like, an inertial force acts on the bridge girder 16, so that the bridge girder 16 and the pier 12 will vibrate relatively in the horizontal direction. And Upper shoe 24 of bearing 15 and lower shoe 2
6 vibrates horizontally, and the bridge girder 16 vibrates horizontally with respect to the pier 12.

Due to the vibration of the bridge girder 16 with respect to the bridge pier 12, the outer cylinder 46 is also displaced relative to the inner cylinder 56 in the horizontal direction as shown in FIGS. Deform. At this time, the rubber body 64 undergoes compression deformation, tensile deformation, shear deformation, or a combination of these, depending on the site, and absorbs the energy of vibration. Further, since the elastic reaction force of the elastic deformation of the rubber body 64 acts on the outer cylinder 46 and the inner cylinder 56 in the horizontal direction as a restoring force, the outer cylinder 4
The relative position of 6 and the inner cylinder 56 tries to return to the position (concentric position) before the vibration occurs, and the movement amount of the relative movement is limited to a certain range. In this way, the amount of relative movement between the outer cylinder 46 and the inner cylinder 56 is limited to a certain range, so that the bridge girder 16
Since the amount of relative movement between the bridge pier 12 and the bridge pier 12 is also limited to a certain range, the bridge girder 16 is prevented from falling from the pier 12 (so-called bridge collapse).

Moreover, the outer cylinder 46, the inner cylinder 56 and the rubber body 6
No. 4 is arranged symmetrically with respect to the central axis C, and the rubber body 64 is deformed in the same manner regardless of the azimuth in any horizontal direction, so that the relative movement, that is, the direction of vibration, is prevented. Instead, the vibration energy can be absorbed in all directions, and the bridge girder 16 can be prevented from falling from the pier 12.

The specific shape and properties of the rubber body 64, as described above, is not particularly limited as long as it can prevent the falling of the piers 12 of the bridge beam 16, in advance, the inner diameter r _1, an outer By setting the diameter r ₂ , the axial length H, the apparent Young's modulus E _ap , and the lateral elastic modulus G to appropriate values, the axial spring constant K is set within a predetermined range, and the horizontal force expected during an earthquake etc. Corresponding to, it is possible to surely prevent the bridge from falling.

That is, in general, for a cylindrical vibration-proof rubber, the lateral spring constant K is calculated by the apparent Young's modulus E _ap , lateral elastic modulus G, inner diameter r ₁ , outer diameter r ₂ , and axial length of the vibration-proof rubber. Sa H
Can be used to calculate K = π (E _ap + G) H / log _e (r ₂ / r ₁ ). The apparent Young's modulus E _ap is the shape ratio S, and E _ap = (4 + 3.29S ² ) G The shape ratio S is S = H / (r1 + r2) / log _e (r ₂ / r ₁ ). Can be calculated respectively.

For example, a horizontal force of 1000 kN is produced during an earthquake.
Even when used, the horizontal displacement is 20 mm or less.
Inner diameter r₁R₁= 400 mm, outside
Diameter r ₂R₂= 500 mm, axial length H is H = 300 m
m, lateral elastic modulus G is G = 0.98 N / mm²given that,   S = 300 / (400 + 500) / log_e(500/400)     = 1.494   E_ap= (4 + 3.29 × 1.494²) × 0.98         = 11.34 N / mm²   K = π (11.34 + 0.98) × 300 / log_e(500/400)     = 52.1 kN / mm Therefore, the horizontal displacement is Displacement amount = horizontal force / K = 1000 / 52.1 = 19.2 mm Therefore, it can be seen that it can be suppressed to 20 mm or less.

Of course, the above numerical calculation is just an example. That is, in consideration of the scale of the upper structure and the lower structure according to the present invention, the required seismic resistance, etc.
The amount of movement in the horizontal direction can be limited to a predetermined range by combining the rubber body 64, the inner cylinder 56, and the outer cylinder 46 that form part 4 with appropriate shapes and materials to obtain a desired lateral spring constant. It is possible.

Further, the vibration control device 44 of the present embodiment can be constructed only by disposing the rubber body 64 between the outer cylinder 46 and the inner cylinder 56, so that the structure is simple and the weight is increased. Can be configured without.

Moreover, since the outer cylinder 46 and the inner cylinder 56 need only be attached to the bridge girder 16 or the pier 12, respectively,
Installation is easy, and it can be retrofitted to an existing bridge, for example.

In the above description, the outer cylinder 46 is fixed to the bridge girder 16 which is the upper structure, and the inner cylinder 56 is fixed to the bridge pier 12 which is the lower structure. However, conversely, the outer cylinder 46 is fixed to the bridge pier 12. In addition, the inner cylinders 56 may be fixed to the bridge girders 16, respectively. Also, the method of attaching these is not particularly limited. In particular, fixing with the above-mentioned bolts or fixing by welding is preferable because it can be easily retrofitted to an existing structure.

Also, as the upper structure and the lower structure, the bridge girder 16 and the bridge pier (or abutment) 1 described above, respectively.
It is not limited to 2. That is, if the vibration control support structure 66 of the present invention is applied to a structure in which the upper structure is supposed to fall from the lower structure due to vibration or the like, the upper structure can be prevented from falling.

The shapes of the inner member and the outer member are not limited to the cylindrical inner cylinder 56 and outer cylinder 46 described above.
For example, the inner cylinder 56 may be cylindrical, and is preferably cylindrical from the viewpoint of weight reduction and cylindrical from the viewpoint of increasing strength. The outer cylinder does not have to be cylindrical, and may have any shape such as a hollow conical shape so long as it surrounds the inner member over the entire circumference. Further, the inner member and the outer member may be formed into a polygonal tubular shape, for example. Regardless of the shape, if the inner member and the outer member partially overlap with each other when viewed in the horizontal direction, the rubber between the inner member and the outer member corresponds to the overlapped portion. By arranging (preferably adhering) the body 64, the horizontal force can be absorbed by the rubber body 64 to limit the amount of movement of the upper structure and prevent the upper structure from falling from the lower structure. .

[0059]

Since the present invention has the above-described structure, it has a small and simple structure, can be easily attached to an existing structure, and can absorb energy regardless of the direction of relative movement.

[Brief description of drawings]

FIG. 1 is a side view of a bridge to which a fall prevention device including a vibration control device according to an embodiment of the present invention is applied.

FIG. 2 is a front view of a bridge to which a fall prevention device including a vibration control device according to an embodiment of the present invention is applied.

FIG. 3 is a perspective view showing a movable bearing which constitutes a fall prevention device according to an embodiment of the present invention.

FIG. 4 is a front view showing the vibration control device according to the embodiment of the present invention in a state of being attached to a bridge.

FIG. 5 shows a vibration control device according to an embodiment of the present invention,
(A) is a plan view and (B) is a partially cutaway front view.

FIG. 6 shows a vibration control device according to an embodiment of the present invention in a deformed state, (A) is a plan view, and (B) is a partially cutaway front view.

FIG. 7 is a cross-sectional view showing a vibration control device according to an embodiment of the present invention.

FIG. 8 shows a conventional bridge prevention device, (A) is a plan view,
(B) is a front view.

FIG. 9 shows a bridge connected by a conventional connector,
(A) is a front view and (B) is a plan view.

FIG. 10 is a front view showing a conventional bridge prevention device,
(A) is before deformation, (B) is after deformation.

[Explanation of symbols]

10 bridges 12 Piers (substructure) 14 fixed bearing 15 Movable bearing 16 Bridge girder (superstructure) 44 Vibration control device 46 Outer cylinder (outer member) 56 Inner cylinder (inner member) 64 Rubber body (elastic body) 66 Vibration control support structure 68 Falling bridge prevention device

Claims (9)

[Claims] 1. An outer member formed in a substantially tubular shape and fixed to one of an upper structure and a lower structure; and an outer member fixed to the other of the upper structure and the lower structure, inside the outer member, An inner member arranged so as to overlap the outer member when viewed in the horizontal direction; and an inner member that is arranged in contact with the inner member and the outer member over the entire circumference of the outer member between the inner member and the outer member. And an elastic body that elastically deforms due to relative horizontal displacement between the outer member and the outer member. 2. The vibration control device according to claim 1, wherein the elastic body is fixed to the inner member and the outer member over the entire circumference. 3. The vibration control device according to claim 1, wherein the outer member is formed in a cylindrical shape, and the inner member is formed in a cylindrical shape or a cylindrical shape. 4. The vibration damping device according to claim 3, wherein the outer member and the inner member are arranged concentrically. 5. The outer member and the inner member are arranged such that the axial length of the outer member and the axial length of the inner member are substantially the same, and are overlapped when viewed in the horizontal direction over substantially the entire axial lengths of the respective outer members. The vibration damping device according to claim 3 or 4, wherein the vibration damping device is arranged. 6. The elastic body is formed into a cylindrical shape, and the equation K = π (E _ap + G) H / log _e (r ₂ / r ₁ ) (where the apparent Young's modulus E _ap is the shape ratio S E _ap = (4 + 3.29S ² ) G The shape ratio S is given by: S = H / (r ₁ + r ₂ ) / log _e (r ₂ / r ₁ )) The inner diameter r ₁ , the outer diameter r ₂ , the axial length H, the apparent Young's modulus E _ap , and the lateral elastic modulus G are set so as to be in the range of respectively. Seismic control device. 7. The method according to claim 1, wherein at least one of the outer member and the inner member has a mounting flange for mounting on a structure. Seismic control device. 8. A bearing which is arranged between the upper structure and the lower structure to support a load of the upper structure, and is arranged between the upper structure and the lower structure. A vibration control device according to claim 7, and a vibration control support structure. 9. The upper structure is a bridge girder and the lower structure is a pier or abutment, and the vibration control support structure according to claim 8 is provided between the bridge or bridge girder and the pier or abutment. Fall prevention device characterized by.