JP2012017806A - Base isolation support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a support device comprising a laminated rubber and a stopper member from being damaged due to a shock at collision of the laminated rubber to the stopper when earthquake motion larger than designed earthquake motion is applied, and to prevent an article installed in a building from being damaged due to a large shock applied to the building at the collision.SOLUTION: The support device includes the laminated rubber 3 and the stopper member 4 therefor, a lower end of the stopper member 4 is in contact with a lower end of the laminated rubber 3, a support surface 5 of the stopper member 4 facing the laminated rubber 3 is separated from the laminated rubber 3 from the lower end toward the upper end and has a convex shape on a side of the laminated rubber 3 when viewed in a vertical cross section, and thus even if earthquake motion larger than the deigned earthquake motion is applied, the laminated rubber 3 makes facial contact with a convex support surface 5b on the upper side of the support surface 5 while gradually increasing the horizontal rigidity, so that impact force at collision of the laminated rubber 3 to the stopper member 4 is alleviated.

Description

  The present invention relates to a seismic isolation device for a building.

  In recent years, seismic isolation structures are increasingly used in condominiums and office buildings. These seismic isolation structures typically use laminated rubber with low rigidity in the horizontal direction to extend the natural period of the building so that large earthquake acceleration is not transmitted to the building. Laminated rubber has a property that it is stiff in the vertical direction and soft in the horizontal direction by laminating the rubber layers and steel plates alternately and freeing only the horizontal shear deformation of the rubber layer. .

  Conventionally, in order to suppress a horizontal displacement when a predetermined input such as a design seismic motion exceeds a predetermined input, a concept of providing a device (stopper member) for suppressing the displacement is known in addition to a bearing device using laminated rubber. For example, the deformation limiting member (3) in Patent Document 1, the wire (11), and the stopper portion (18) in Patent Document 2 correspond to this. However, when the bearing device made of laminated rubber is greatly displaced by the action of an excessive external force, if the laminated rubber or the like collides with the stopper member, the impact will hit the building and the equipment installed inside the building will be damaged. The problem is considered.

  With respect to the above problem, Patent Document 3 proposes a structure in which an elastic rubber (8) is attached to an annular stopper portion (6) surrounding the outer periphery of a laminated rubber. When the stopper starts to work, the elastic rubber of the stopper member makes it possible to suppress deformation softly. According to this structure, when the laminated rubber is greatly deformed, the laminated rubber collides with the elastic rubber of the stopper, but the impact is alleviated by the elastic rubber. However, in this structure, the load in the vertical direction is large, and the influence on the restoring force characteristics of the deformed laminated rubber is not taken into consideration. Therefore, it is necessary to limit the horizontal deformation of the stopper to a range in which buckling does not occur, and as a result, there is a problem that a large horizontal displacement cannot be allowed.

  The relationship shown in FIG. 5 is generally provided between the horizontal force F (horizontal force) applied to the laminated rubber and the displacement δ of the laminated rubber in a state in which a normal compressive load in the vertical direction is applied to the laminated rubber. There is. That is, as the horizontal force F increases, the horizontal displacement δ of the laminated rubber increases accordingly. However, when the displacement δ of the laminated rubber exceeds a predetermined value a, the laminated rubber is buckled and the horizontal direction The resilience of is quickly lost. Here, buckling refers to a phenomenon in which a laminated rubber that receives a compressive load in the vertical direction suddenly loses a load supporting force in the vertical direction at a certain point in time with a load / deformation in the horizontal direction. As soon as buckling occurs, the restoring force in the horizontal direction is lost rapidly. This is schematically shown in FIG.

  On the other hand, in Patent Document 4, an inverted cone in which a backup laminated rubber bearing ring 2 surrounding the outer circumference of the laminated rubber is formed, and a side surface facing the laminated rubber of the backup laminated rubber bearing ring is inclined outward toward the upper part. A seismic isolation support device has been proposed. The angle of inclination of the laminated rubber bearing ring is determined in accordance with the design limit deformation of the laminated rubber 1 disposed at the center. Even in a state where the deformation of the laminated rubber 1 reaches the allowable deformation amount, the laminated rubber support ring 2 cooperates with the laminated rubber 1 and assumes the vertical load of the building. However, even in this structure, since the laminated rubber must not buckle before contacting the backup laminated rubber bearing ring, the distance to the backup laminated rubber bearing ring or the laminated rubber of the backup laminated rubber bearing ring There is a problem that the inclination angle of the side surface cannot be increased. Further, when the laminated rubber collides with the backup laminated rubber ring, there is a problem that an impact force is generated although it is reduced as compared with the case where the laminated rubber collides with the rigid body.

JP-A-01-203542 JP 09-067956 ACT 02-101832 Real fairness 05-020808

  In view of the above-mentioned problems of the prior art, the present invention is composed of a laminated rubber and a stopper member that allows a large deformation and, at the same time, reduces or does not generate an impact applied to a building for the following purposes. Provide a bearing device. In other words, even when a horizontal force exceeding a predetermined level is applied to the laminated rubber due to an earthquake and the laminated rubber is greatly deformed, buckling does not occur, the laminated rubber is prevented from being damaged, and the horizontal restoring force and load bearing force It is prevented from being lost, and the impact when the laminated rubber comes into contact with the stopper member is reduced.

  In order to solve the above-described problems, in one embodiment of the present invention, a laminated rubber and a stopper member are provided, and an upper end (or lower end) of the stopper member is an upper end (or lower end) of the laminated rubber. A support surface that is close to and faces the laminated rubber of the stopper member moves away from the laminated rubber from the upper end (or lower end) to the other end, and is a support that is convex toward the laminated rubber in a vertical sectional view. Propose the device.

  In the bearing device having the above structure, the support surface of the stopper member and the side surface of the laminated rubber come into contact with each other as the laminated rubber is deformed in the horizontal direction. Thereafter, when the laminated rubber is deformed in the horizontal direction, the range in which the side surface of the laminated rubber is in contact with the support surface gradually increases, and the horizontal deformation of the laminated rubber gradually increases.

  The portion of the laminated rubber that is in contact with the support surface is restrained from further horizontal deformation by the support surface. Accordingly, only the portion not in contact with the support surface of the laminated rubber is further deformed in the horizontal direction. The height of the horizontally deformable portion of the laminated rubber is lower (smaller) than the height of the (original) laminated rubber before the deformation, and substantially no further deformation in the horizontal direction. Behaves as a laminated rubber with a smaller aspect ratio than the original laminated rubber. When horizontal deformation further increases, the contact range between the laminated rubber and the support surface further increases, and the horizontal displacement increases and the contact range between the two increases, and the laminated rubber deforms in the horizontal direction. The substantial height of the is reduced, and the rigidity in the horizontal direction is increased accordingly.

  From the above behavior of the laminated rubber, by gradually increasing the horizontal rigidity of the laminated rubber until reaching the maximum horizontal displacement of the laminated rubber (a state in which the laminated rubber contacts the support surface over the entire height), The impact when the laminated rubber is restrained by the stopper member can be reduced. Alternatively, the deformation can be suppressed so that the entire side surface of the laminated rubber does not come into contact with the support surface of the stopper member. When the side surface of the laminated rubber is in contact with the supporting surface, the supporting surface bears a part of the vertical load, and at the same time, the substantial aspect ratio of the laminated rubber is reduced, so that the laminated rubber is buckled. Absent. That is, according to the present invention, the laminated rubber prevents the buckling when the laminated rubber exceeds a predetermined deformation (maximum allowable deformation) and increases the rigidity in the horizontal direction immediately before the maximum deformation with respect to the design earthquake motion. Gradually the maximum allowable deformation will be reached and the impact on the building can be mitigated.

  In one embodiment of the present invention, a support device is proposed in which the support surface is linear within a predetermined range from the upper end or the lower end in a vertical sectional view.

  When the support surface is linear in a predetermined range from the upper end or the lower end in a vertical sectional view, the horizontal direction of the laminated rubber is within the predetermined range, and the laminated rubber is an inclined surface. It is possible to absorb the seismic motion by the laminated rubber without contacting the surface.

  In an embodiment of the present invention, the range in which the support surface is linear in a vertical sectional view is set so that the laminated rubber and the support surface come into contact with each other when the laminated rubber is deformed to the maximum with respect to design earthquake motion. Propose a bearing device.

  By setting the linear range of the support surface so that the laminated rubber abuts the support surface at the maximum deformation of the laminated rubber against the design earthquake motion, the laminated rubber contacts the support surface when an earthquake motion within the design earthquake occurs. It is possible to absorb the seismic motion without doing so.

  In one embodiment of the present invention, a support device is proposed in which the support surface is linear in a vertical cross-sectional view, and is set so that the laminated rubber and the support surface come into contact with each other when the laminated rubber has the maximum allowable deformation. To do.

  By setting the linear range of the support surface so that the laminated rubber and the support surface are in contact with each other at the maximum allowable deformation of the laminated rubber, the allowable range of the design ground motion is increased and the buckling of the laminated rubber is reduced. Can be prevented.

  In one embodiment of the present invention, the range in which the support surface is linear in a vertical sectional view is set based on the horizontal rigidity requirement of the remaining laminated rubber after the laminated rubber and the support surface abut. Propose a bearing device.

  Considering the horizontal rigidity of the remaining laminated rubber by setting the linear range of the supporting surface based on the horizontal rigidity requirement of the remaining laminated rubber after the laminated rubber and the supporting surface abut. The optimal range of the support surface on a straight line can be set, and the impact after the laminated rubber comes into contact with the support surface can be reduced.

  In one embodiment of the present invention, a support device is proposed in which the support surface is curved in a vertical sectional view from the upper end or the lower end.

  Since the support surface consists only of a curved portion, the displacement of the laminated rubber can be reduced by the support surface even with respect to the earthquake motion within the range of the design earthquake motion.

  In one embodiment of the present invention, a support device is proposed in which the stopper member is provided around the laminated rubber and the supporting surface faces the outer peripheral surface of the laminated rubber.

  Since the stopper member is provided around the laminated rubber, the laminated rubber can be supported by the supporting surface of the stopper member regardless of the horizontal force applied from any direction of the laminated rubber.

  In one embodiment of the present invention, a laminated rubber has a hollow horizontal cross section, a stopper member is provided in a hollow portion of the laminated rubber, and a support surface is proposed that faces the hollow inner peripheral surface of the laminated rubber. To do.

  By providing the stopper member in the hollow portion of the hollow laminated rubber, the installation area of the seismic isolation device can be made more compact.

  In one embodiment of the present invention, a stopper device is further provided around the hollow laminated rubber, and a support device is proposed in which the support surface of the stopper member faces the outer peripheral surface of the hollow laminated rubber.

  By further providing a stopper member around the hollow laminated rubber, the stopper member for preventing the deformation of the laminated rubber can be further strengthened.

  In one embodiment of the present invention, a bearing device is proposed in which the laminated rubber and the stopper member have a rotational shape around the central axis of the laminated rubber.

  By making the laminated rubber and the stopper member have a rotational shape centered on the central axis of the laminated rubber, a structure capable of withstanding earthquake motion from any direction can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the support apparatus with a stopper member which relieve | moderates the impact force added to a building can be provided. That is, when a large horizontal force due to an earthquake or the like acts on the building, the laminated rubber can be prevented from buckling by being greatly deformed. Further, the impact at the time of collision when the laminated rubber comes into contact with the stopper member can be reduced, and thereafter, the laminated rubber can be prevented from buckling.

  Hereinafter, the present invention will be described based on examples shown in the drawings.

  FIG. 1 is a sectional view schematically showing a first embodiment of the present invention. In this figure, 1 indicates the base of a base isolation structure (not shown) such as a building having a base isolation support, and 2 indicates the upper structure of the base isolation structure. A laminated rubber 3 is provided between the foundation 1 and the upper structure 2. The seismic isolation structure is usually provided with a plurality of laminated rubbers depending on its size, shape, and the like. 4 is a stopper member. The laminated rubber 3 and the stopper member 4 have a rotational shape around the central axis 3 c of the laminated rubber 3.

  For the convenience of seismic isolation design, the laminated rubber and its stopper member are representative of a rotational shape, that is, a cylindrical laminated rubber and a trumpet shaped stopper member around the central axis of the laminated rubber. The laminated rubber and the stopper member according to need not necessarily have a rotational shape. Due to the restriction of the installation position or the like, a cylindrical laminated rubber having an elliptical cross section and a stopper member surrounding the periphery in a similar shape may be used. Further, if necessary, a configuration such as a laminated rubber having a prismatic polygonal cross section is also assumed.

  In FIG. 1, a stopper member 4 is provided on the outer periphery of the laminated rubber 3 so as to open in a trumpet shape as it rises upward. As an example of the specific shape, the lower end portion of the support surface 5 of the stopper member 4 facing the outer peripheral surface 3 a of the laminated rubber 3 is provided close to the lower end portion of the laminated rubber 3. In FIG. 1, the support surface 5 has a shape that moves away from the laminated rubber from the lower end portion toward the upper end portion. The support surface 5 includes a straight portion 5a that forms a straight line in a cross-sectional view and a curved portion 5b that forms a curve. As a result, the support surface 5 is convex toward the laminated rubber 3 in the vertical cross-sectional view of FIG. Further, the linear portion 5a of the stopper member 4 has a linear gradient that simultaneously contacts from the lower part of the outer peripheral surface 3a of the laminated rubber 3 to the middle abdomen when the laminated rubber 3 is deformed to the maximum with respect to the design earthquake motion.

  FIG. 1 shows a form in which the lower end portion of the support surface 5 of the stopper member 4 is provided close to the lower end portion of the laminated rubber 3, but the upper end portion of the stopper member 4 is laminated rubber. The supporting surface 5 may be close to the upper end of 3 and away from the laminated rubber 3 from the upper end toward the lower end. That is, the form shown in FIG. 1 and the aspect upside down are also possible. In the present specification, as an example, the present invention will be described below based on an embodiment in which the lower end portion of the support surface 5 and the lower end portion of the laminated rubber 3 are provided close to each other.

  There may be various modes as to how close the lower end (or upper end) of the stopper member and the lower end (or upper end) of the laminated rubber are provided. The lower end portions (or the upper end portions) can be brought into contact with each other or separated from each other by a predetermined distance as long as the excellent actions and effects of the present invention described in the present specification can be exhibited.

  The stopper member 4 is preferably made of a hard and high-strength member, but it is not impossible to use an elastic body as long as it has a strength that can support the deformation of the laminated rubber 3 due to a horizontal force based on the design earthquake motion. For example, a reinforced concrete or steel stopper member can be provided. Or a laminated rubber and an elastic body may be sufficient.

  As shown in FIG. 1, the support surface 5 of the stopper member 4 is provided with a curved portion 5 b that is curved in a sectional view. When a horizontal force exceeding a predetermined level (for example, a right-pointing arrow in FIG. 2) is applied, the upper portion of the laminated rubber 3 is deformed according to the curve of the curved portion 5b, so that the displacement of the laminated rubber 3 in the horizontal direction is limited. The At this time, the rigidity (apparent rigidity or effective rigidity) of the laminated rubber 3 gradually increases, and the impact on the upper structure 2 is reduced. Eventually, since the laminated rubber 3 is supported by the hard high-strength stopper member 4 before the horizontal deformation of the laminated rubber 3 exceeds the deformation causing the buckling, the laminated rubber 3 is prevented from buckling. I can do it.

Here, for example, the following design can be made for a large horizontal force caused by the earthquake motion.
(1) Countermeasures for design ground motion When the ground motion within the range designed for the building is generated, the laminated rubber 3 absorbs the vibration of the building. That is, the outer peripheral surface 3a of the laminated rubber 3 absorbs the deformation in the horizontal direction due to the earthquake motion without contacting the linear portion 5a of the support surface 5 of the stopper.
(2) Measures for Exceeding Design Seismic Motion When seismic motion exceeding the designed seismic motion occurs in the building, the maximum deformation of the laminated rubber 3 against the designed seismic motion occurs, and the outer peripheral surface 3a of the laminated rubber 3 is a stopper member 4 It abuts on the straight portion 5a of the support surface 5 of the. At this time, the deformation of the laminated rubber 3 is desirably less than the maximum allowable deformation that causes the laminated rubber 3 to buckle.
(3) Measures to prevent buckling If the support surface 5 does not exist after the laminated rubber 3 abuts against the support surface of the stopper member 4 as described above against the earthquake motion exceeding the design earthquake motion, the stacking is performed. The rubber 3 may be buckled. In order to prevent this buckling, the range of the straight part 5a of the support surface 5 and the inclination of the curve of the curved part 5b can be adjusted.

  Here, the design ground motion refers to the ground motion considered when designing the base isolation structure. Specifically, the deformation amount of the laminated rubber due to the seismic motion can be set as a deformation when the side surface of the laminated rubber comes into contact with the support surface of the stopper (this is called a maximum deformation with respect to the design seismic motion). When the deformation of the laminated rubber is equal to or less than the maximum deformation amount, the laminated rubber exhibits a linear behavior and does not generate an impact. This maximum deformation needs to be allowed in view of not causing allowable stress and buckling of the laminated rubber.

  When the design earthquake motion is exceeded and the deformation exceeding the maximum deformation occurs in the laminated rubber 3, as shown in FIG. 2, the portion of the laminated rubber 3 that is not yet in contact with the linear portion 5 a of the support surface 5. Since the horizontal deformation of the laminated rubber 3 is gradually limited by the support surface 5, the horizontal rigidity increases as the deformation increases. Here, compared to the overall height of the laminated rubber 3 (height H in FIG. 1), the height of the remaining laminated rubber (height h in FIG. 1) not yet in contact with the support surface 5 is reduced. Yes. Accordingly, the rigidity of the laminated rubber in the horizontal direction is greater than the rigidity of the entire laminated rubber at the beginning.

  FIG. 6 schematically shows the relationship between the amount of deformation (displacement) of the laminated rubber and the force applied in the horizontal direction in the bearing device according to the present invention. In FIG. 6, the vertical axis represents the horizontal force F applied to the laminated rubber, and the horizontal axis represents the horizontal displacement δ of the laminated rubber. As the horizontal force applied to the laminated rubber 3 increases, the horizontal displacement δ of the laminated rubber 3 increases. When the outer peripheral surface 3a of the laminated rubber 3 abuts on the straight portion 5a of the support surface 5 of the stopper member 4 and the displacement δ reaches a predetermined value b, the surface of the laminated rubber 3 is attached to the straight portion of the support surface 5. Subsequent horizontal displacement is limited.

  Thereafter, when a horizontal force is applied to the laminated rubber 3, the deformation of the laminated rubber 3 is limited to the horizontal deformation of a portion (residual laminated rubber) further above that portion. The remaining height of the deformable laminated rubber 3 is lower (smaller) than the height of the original laminated rubber 3 and substantially behaves as a laminated rubber 3 having a smaller aspect ratio than the original laminated rubber 3. The upper portion of the laminated rubber 3 gradually contacts the support surface 5 according to the curve of the curved portion 5b of the support surface 5.

  The horizontal rigidity of the portion can be adjusted by the curve of the curved portion 5b. That is, in the laminated rubber 3, the remaining height of the laminated rubber 3 decreases as the contact range with the support surface convex upward in the cross-sectional view gradually increases. Stiffness increases gradually. Eventually, the laminated rubber 3 does not buckle, and all the side surfaces abut against the hard high-strength stopper member 4 to prevent the laminated rubber 3 from being deformed. However, if the stopper member 4 is an elastic body, it can be further deformed.

  The range of the straight portion 5a of the support surface 5 is set based on the rigidity requirement of the remaining laminated rubber. That is, the range of the straight portion is determined based on the horizontal rigidity of the remaining laminated rubber necessary for preventing the laminated rubber 3 from buckling.

  Conventionally, when deformation exceeding the maximum allowable deformation occurs in the laminated rubber, the laminated rubber 3 may buckle during deformation as shown in FIG. 5, and the laminated rubber 3 contacts the stopper member 4. When touching, it was to receive a big impact. However, as described above, in the present invention, when the seismic motion exceeding the design seismic motion occurs, the laminated rubber 3 comes into contact with the linear portion 5a of the support surface 5 of the stopper member 4 and is subjected to further horizontal displacement. As a result, the curved portion 5b of the support surface gradually increases the horizontal rigidity of the remaining laminated rubber, thereby reducing the impact and preventing the laminated rubber 3 from buckling.

  FIG. 3 is a cross-sectional view schematically showing a second embodiment of the present invention. In this figure, description of the same parts as those in FIG. 1 is omitted. Also in this embodiment, a laminated rubber 3 is provided between the base portion 1 and the upper structure 2. However, the laminated rubber 3 is different from the first embodiment in that the laminated rubber 3 has a hollow horizontal cross section. A stopper member 4 is provided in the hollow portion of the laminated rubber 3. Further, a stopper member 4 may be further provided outside the laminated rubber 3 as in the first embodiment. The laminated rubber 3 and the stopper member 4 are provided in a rotational shape around the central axis 3c of the laminated rubber. This shape is not limited to the rotational shape, as in the case of the first embodiment. Further, the stopper member 4 can be in the form shown in FIG. 3 and upside down.

  In FIG. 3, a mountain-shaped stopper member 4 that is closed upward is provided in the hollow portion of the laminated rubber 3. As an example of the specific shape, as shown in FIG. 3, the lower end portion of the support surface 5 of the stopper member 4 facing the laminated rubber 3 is provided close to the lower end portion of the laminated rubber 3. In FIG. 3, the support surface 5 has a shape that moves away from the inner peripheral surface 3 b of the laminated rubber 3 from the lower end portion toward the upper end portion. The support surface 5 is composed of a straight line portion forming a straight line and a curved line portion forming a curve, as in the case of the first embodiment. As a result, the support surface 5 has a convex shape on the inner peripheral surface side of the laminated rubber 3 in the vertical sectional view of FIG. Further, the linear portion of the stopper member 4 has a linear gradient that uniformly contacts from the lower part of the inner peripheral surface of the laminated rubber 3 to the middle part when the horizontal deformation of the laminated rubber 3 reaches a predetermined value. Yes.

  In the first and second embodiments, how to determine the length of the straight portion 5a and the length of the curved portion 5b of the support surface 5 is appropriately determined at the time of designing, including the shape without the straight portion 5a. it can. The curved portion 5b may have an arc shape or a curved shape other than the arc. In the case of an arc shape, how to determine the radius of curvature can be appropriately determined at the time of design.

  FIG. 4 is a cross-sectional view schematically showing a third embodiment of the present invention. In this embodiment, the support surface 5 of the stopper member 4 is convex on the laminated rubber side in a vertical sectional view, but the straight portion 5a of the support surface 5 is not provided. The place where all the support surfaces are formed by the curved portion 5b is different from the first and second embodiments. By adjusting the curvature of the curved portion, the horizontal deformation amount of the laminated rubber 3 and the deformation restraining force by the stopper member 4, that is, the relationship between the support force and the horizontal deformation amount of the laminated rubber can be adjusted. It is also possible to prevent the impact between the laminated rubber and the stopper when the design earthquake motion is exceeded. Also in this embodiment, it is possible to adopt a configuration in which the stopper is installed in the hollow portion of the laminated rubber. Further, the stopper member 4 can be in the form shown in FIG. 4 and upside down.

  The present invention relates to a bearing device in a seismic isolation structure in which laminated rubber is disposed between the structure and its foundation.

FIG. 1 is a sectional view showing a first embodiment of a bearing device according to the present invention. FIG. 2 is a cross-sectional view showing a deformed shape of the support device according to the present invention when a horizontal force is applied. FIG. 3 is a sectional view showing a second embodiment of the bearing device according to the present invention. FIG. 4 is a cross-sectional view showing a third embodiment of the bearing device according to the present invention. FIG. 5 is a diagram showing the relationship between the horizontal force of the laminated rubber subjected to a vertical load and the amount of deformation (displacement) δ in the horizontal direction. FIG. 6 is a diagram showing the relationship between the horizontal force and the horizontal deformation amount (displacement) δ in the bearing device according to the present invention.

DESCRIPTION OF SYMBOLS 1 Foundation 2 Superstructure 3 Laminated rubber 3a Outer peripheral surface of laminated rubber 3b Inner circumferential surface of laminated rubber 3c Central axis of laminated rubber 4 Stopper member 5 Support surface 5a Straight portion of support surface 5b Curve portion of support surface

Claims (10)

  A laminated rubber and a stopper member, and an upper end or a lower end of the stopper member is close to an upper end or a lower end of the laminated rubber, and a support surface of the stopper member facing the laminated rubber is from the upper end or the lower end. A bearing device that moves away from the laminated rubber toward the other end and is convex toward the laminated rubber in a vertical sectional view.   The support device according to claim 1, wherein the support surface is linear within a predetermined range from the upper end or the lower end in a vertical sectional view.   The support device according to claim 2, wherein a range in which the support surface is linear in a vertical sectional view is set so that the laminated rubber and the support surface come into contact with each other at the maximum deformation of the laminated rubber with respect to a design earthquake motion. .   The support device according to claim 2, wherein a range in which the support surface is linear in a vertical sectional view is set so that the laminated rubber and the support surface come into contact with each other when the laminated rubber is allowed to undergo maximum allowable deformation.   5. The range in which the support surface is linear in a vertical sectional view is set based on a rigidity requirement in a horizontal direction of the remaining laminated rubber after the laminated rubber comes into contact with the support surface. The bearing device according to any one of the above.   The support device according to claim 1, wherein the support surface is curved in a vertical cross-sectional view from the upper end or the lower end.   The support device according to any one of claims 1 to 6, wherein the stopper member is provided around the laminated rubber, and the support surface faces an outer peripheral surface of the laminated rubber.   The laminated rubber has a hollow horizontal cross section, the stopper member is provided in a hollow portion of the laminated rubber, and the support surface faces a hollow inner peripheral surface of the laminated rubber. The bearing device according to claim 1.   The support device according to claim 8, wherein a stopper member is further provided around the hollow laminated rubber, and a support surface of the stopper member faces an outer peripheral surface of the hollow laminated rubber.   The bearing device according to any one of claims 1 to 9, wherein the laminated rubber and the stopper member have a rotational shape around a central axis of the laminated rubber.

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