Displacement suppression device

Abstract

To provide a displacement inhibition device which can inhibit excessive displacement in a given direction on a horizontal surface while reducing an installation space.SOLUTION: In a displacement inhibition device 1, a lower member 3 has: a lower substrate part 31 in which a lower slide surface 32a formed in a planar shape is provided at an upper part; and a lower peripheral wall part 36. An upper member 4 has: an upper substrate part 41 in which an upper slide surface 42a formed in a planar shape is provided at a lower part; and an upper peripheral wall part 46. A slide member 5 has: a lower wall part 53 provided with a lower slide surface 53a slidable with respect the lower slide surface 32a and formed in a planar shape; an upper wall part 55 provided with an upper slide surface 55a slidable with respect the upper slide surface 42a and formed in a planar shape; and a connection part 51 for connecting the lower wall part 53 with the upper wall part 55. The slide member 5 slides relative to the lower member 3 and the upper member 4, the slide member 5 can contact with the lower peripheral wall part 36 and the upper peripheral wall part 46.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a displacement suppression device.

Background Art

[0002] Conventionally, seismic isolation structures have excellent features not only in preventing damage to structures during large earthquakes but also in ensuring the sense of security of residents and maintaining facilities. However, when an unexpected large earthquake occurs, there is a risk that the building may sway beyond the clearance (the movable range in design), a part of the building may collide with the retaining wall, or the seismic isolation device may be damaged and lose its supporting capacity. As a fail-safe mechanism to prevent such a situation, an excessive displacement suppression device using collision buffer rubber (for example, see Patent Documents 1 and 2 below) has been used. However, these excessive displacement suppression devices have a problem in that they require a large installation space.

[0003] On the other hand, as a sliding bearing with a relatively small installation size, a spherical sliding bearing (FPS, SSB) is known. This is a structure in which a slider (or a movable element) is sandwiched between upper and lower concave plates (plates having a sliding surface) having a sliding surface formed with a spherical recess. Since sliding occurs between the upper and lower surfaces of the slider and the sliding surface of the concave plate, the relative sliding amount generated between the slider and the upper and lower concave plates has a feature that it can be half of the displacement of the seismic isolation layer. Also, compared with the case where there is only one sliding surface, it has a feature that the space required for installing the seismic isolation device becomes smaller.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the spherical sliding bearing described above, the slider or movable element, which slides between the upper and lower spherical sliding surfaces, smoothly transmits axial force (vertical load) while the frictional force generated on the sliding surfaces acts as a horizontal shear force. The coefficient of friction generated on the sliding surfaces is small, around 0.01 to 0.05, and the size is determined by the axial force (the required planar dimensions can be determined from the surface pressure acting on the sliding surfaces). Thus, in spherical sliding bearings, the slider or movable element was not used in a way similar to a shear key, where it bore a large shear force.

[0006] In the specification described in Patent Document 1, where a part of the building collides with the retaining wall, displacement can only be suppressed in one direction. In the specification described in Patent Document 2, where a support beam is extended from the seismic isolation superstructure and collides with a ring-shaped stopper, there is a problem in that it requires a large installation space.

[0007] Therefore, the present invention has been made in view of the above circumstances, and provides a displacement suppression device that can suppress excessive displacement in any direction in the horizontal plane while reducing the installation space. [Means for solving the problem]

[0008] To achieve the above objective, the present invention employs the following means. In other words, the displacement suppression device according to the present invention is a displacement suppression device installed between a lower structure and an upper structure that is movable relative to the lower structure, comprising: a lower member; an upper member; and a sliding member disposed between the lower member and the upper member and slidable relative to the lower member and the upper member, wherein the lower member has a lower base plate portion fixed to the lower structure and a lower sliding surface formed in a planar shape provided at the top, and a lower peripheral wall portion extending upward from the lower base plate portion, and the upper member has an upper base plate portion fixed to the upper structure and an upper sliding surface formed in a planar shape provided at the bottom, and the upper The sliding member has an upper peripheral wall portion extending downward from the base portion, and the sliding member has a lower wall portion that is slidable against the lower sliding surface and has a lower sliding surface formed in a planar shape, an upper wall portion that is slidable against the upper sliding surface and has an upper sliding surface formed in a planar shape, and a connecting portion that connects the lower wall portion and the upper wall portion, and when the sliding member slides against the lower member and the upper member, the sliding member can come into contact with the lower peripheral wall portion and the upper peripheral wall portion, and in a plan view, it is installed inside the superstructure and can be installed at any position regardless of the position of the columns of the superstructure. Furthermore, the structure is configured such that either the lower peripheral wall portion or the upper peripheral wall portion yields first, allowing plastic deformation to proceed. .

[0009] In the displacement suppression device configured in this way, when the sliding member slides against the lower and upper members, the sliding member comes into contact with the lower and upper peripheral walls, thereby suppressing the displacement of the seismic isolation layer. Since the sliding member can slide in any direction in the horizontal plane, excessive displacement of the seismic isolation layer can be suppressed in any direction in the horizontal plane. Furthermore, since the sliding member is displaced relative to the lower and upper members, the relative displacement between the sliding member and the lower member, and the relative displacement between the sliding member and the upper member, is only half the displacement of the seismic isolation layer, thus reducing the planar size and installation space of the displacement suppression device.

[0010] Furthermore, the displacement suppression device according to the present invention may have a cushioning material provided on the outer circumferential surface of the connection portion.

[0011] In the displacement suppression device configured in this way, a cushioning material is provided on the outer circumferential surface of the connection portion of the sliding member. Therefore, when the sliding member collides with the lower and upper peripheral walls, the cushioning material provided on the outer circumferential surface of the connection portion of the sliding member collides with the lower and upper peripheral walls, mitigating the impact load during the collision and reducing the acceleration generated in the superstructure.

[0012] Furthermore, the displacement suppression device according to the present invention may have a cushioning material provided on the inner surface of the lower peripheral wall portion and the upper peripheral wall portion.

[0013] In the displacement suppression device configured in this way, cushioning material is provided on the inner surface of the lower peripheral wall of the lower member and the inner surface of the upper peripheral wall of the upper member. Therefore, when the sliding member collides with the lower peripheral wall and the upper peripheral wall, the sliding member collides with the cushioning material provided on the inner surface of the lower peripheral wall and the inner surface of the upper peripheral wall, thereby mitigating the impact load during the collision and reducing the acceleration generated in the superstructure.

[0014] Furthermore, in the displacement suppression device according to the present invention, the connecting portion may be formed in a cylindrical shape with the vertical direction as the axial direction.

[0015] In the displacement suppression device configured in this way, the connection portion of the sliding member is formed in a cylindrical shape with the vertical direction as the axis. Therefore, the cylindrical sliding member can slide in any direction (any direction) in the horizontal plane. [Effects of the Invention]

[0016] According to the displacement suppression device of the present invention, it is possible to suppress excessive displacement in any direction in the horizontal plane while reducing the installation space. [Brief explanation of the drawing]

[0017] [Figure 1] This is a schematic diagram showing a displacement suppression device according to one embodiment of the present invention. [Figure 2]It is an exploded perspective view showing a displacement suppression device according to an embodiment of the present invention. [Figure 3] It is a vertical sectional view showing a displacement suppression device according to an embodiment of the present invention. [Figure 4] It is a sectional view taken along the line A-A of FIG. 3. [Figure 5] It is a vertical sectional view showing the maximum displacement of the displacement suppression device according to an embodiment of the present invention during an earthquake. [Figure 6] It is a sectional view taken along the line B-B of FIG. 5. [Figure 7] It is a diagram showing the relationship between the displacement of the seismic isolation layer and the reaction force of the displacement suppression device when the bearing capacity and rigidity of the lower peripheral wall portion and the upper peripheral wall portion are large in the displacement suppression device according to an embodiment of the present invention. [Figure 8] It is a diagram showing the relationship between the displacement of the seismic isolation layer and the reaction force of the displacement suppression device when either the lower peripheral wall portion or the upper peripheral wall portion plastically deforms by yielding in advance at P1 in the displacement suppression device according to an embodiment of the present invention. [Figure 9] It is a vertical sectional view showing a displacement suppression device according to Modification 1 of an embodiment of the present invention. [Figure 10] It is a perspective view showing a lower member of a displacement suppression device according to Modification 2 of an embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0018] A displacement suppression device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing a displacement suppression device according to an embodiment of the present invention. As shown in FIG. 1, a displacement suppression device 1 and a seismic isolation device 2 are installed between a foundation (lower structure) 11 and a building (upper structure) 16. The space between the foundation 11 and the building 16 is a seismic isolation layer 12.

[0019] In the seismic isolation layer 12, the displacement suppression device 1 and the seismic isolation device 2 are arranged in parallel. In plan view, the displacement suppression device 1 is arranged substantially at the center of the building 16. In plan view, a plurality of seismic isolation devices 2 are arranged outside the displacement suppression device 1. Note that the arrangement positions of the displacement suppression device 1 and the seismic isolation device 2 can be set as appropriate.

[0020] The lower part of the seismic isolation device 2 is fixed to the upper part of the foundation 11, and the upper part of the seismic isolation device 2 is fixed to the lower part of the building 16. The seismic isolation device 2 has a well-known configuration such as laminated rubber or sliding bearings. The foundation 11 and the building 16 are relatively movable in the horizontal direction.

[0021] The displacement suppression device 1 suppresses excessive horizontal displacement of the seismic isolation layer 12. The displacement suppression device 1 comprises a lower support member (lower member) 3, an upper support member (upper member) 4, and a sliding member 5.

[0022] Figure 2 is an exploded perspective view showing the displacement suppression device 1. As shown in Figure 2, the lower support member 3 is formed in a petri dish shape. The lower support member 3 has a lower base plate portion 31 and a lower peripheral wall portion 36. The lower support member 3 is made of, for example, steel.

[0023] The lower substrate portion 31 is formed in a flat plate shape. The surface of the lower substrate portion 31 is oriented in the vertical direction. In a plan view, the lower substrate portion 31 has a roughly circular shape.

[0024] Figure 3 is a vertical cross-sectional view showing the displacement suppression device 1. As shown in Figure 3, the lower base plate portion 31 is fixed to the upper surface 11a of the foundation 11 by, for example, anchor bolts.

[0025] A lower sliding material 32 is fixed to the upper surface of the lower base plate 31. The lower sliding material 32 is formed in a flat plate shape. The plate surface of the lower sliding material 32 is oriented in the vertical direction. In plan view, the lower sliding material 32 has a roughly circular shape. The lower sliding material 32 is arranged over substantially the entire upper surface of the lower base plate 31. However, the lower sliding material 32 does not necessarily have to be arranged over substantially the entire upper surface of the lower base plate 31. The lower sliding material 32 is made of, for example, a stainless steel plate.

[0026] The upper surface of the lower sliding material 32 is a flat lower sliding surface 32a. The coefficient of friction between the lower sliding surface 32a of the lower sliding material 32 and the lower sliding surface 53a of the sliding member 5 is approximately 0.01 to 0.1. The coefficient of friction between the lower surface of the lower base plate portion 31 and the upper surface 11a of the foundation 11 is 0.4 or higher.

[0027] The lower peripheral wall portion 36 extends upward from the peripheral edge of the lower substrate portion 31. In plan view, the lower peripheral wall portion 36 is formed in an annular shape. In this embodiment, the lower peripheral wall portion 36 is provided around the entire circumference of the peripheral edge of the lower substrate portion 31, but it may also be configured to be provided in multiples at intervals around the peripheral edge of the lower substrate portion 31. Alternatively, the lower peripheral wall portion 36 may extend upward from a portion radially inward from the peripheral edge of the lower substrate portion 31.

[0028] The upper support member 4 is configured by inverting the lower support member 3. In its normal state, the upper support member 4 is positioned vertically above the lower support member 3, spaced apart from the lower support member 3, so as to face the lower support member 3.

[0029] The upper support member 4 is formed in a petri dish shape. The upper support member 4 has an upper base plate portion 41 and an upper peripheral wall portion 46. The upper support member 4 is made of, for example, steel.

[0030] The upper substrate portion 41 is formed in a flat plate shape. The surface of the upper substrate portion 41 is oriented in the vertical direction. In a plan view, the upper substrate portion 41 has a roughly circular shape.

[0031] The upper base plate portion 41 is fixed to the lower surface 16a of the building 16 by means of anchor bolts or the like.

[0032] An upper sliding material 42 is fixed to the lower surface of the upper base plate portion 41. The upper sliding material 42 is formed in a flat plate shape. The plate surface of the upper sliding material 42 is oriented in the vertical direction. In plan view, the upper sliding material 42 has a roughly circular shape. The upper sliding material 42 is arranged over substantially the entire lower surface of the upper base plate portion 41. However, the upper sliding material 42 does not necessarily have to be arranged over substantially the entire lower surface of the upper base plate portion 41. The upper sliding material 42 is made of, for example, a stainless steel plate.

[0033] The lower surface of the upper sliding material 42 is a flat upper sliding surface 42a. The coefficient of friction between the upper sliding surface 42a of the upper sliding material 42 and the upper sliding surface 55a of the sliding member 5 is approximately 0.01 to 0.1. The coefficient of friction between the upper surface of the upper base plate portion 41 and the lower surface 16a of the building 16 is 0.4 or greater.

[0034] The upper peripheral wall portion 46 extends downward from the peripheral edge of the upper substrate portion 41. In plan view, the upper peripheral wall portion 46 is formed in an annular shape. In this embodiment, the upper peripheral wall portion 46 is provided around the entire circumference of the peripheral edge of the upper substrate portion 41, but it may also be configured to be provided in multiples with intervals between them around the peripheral edge of the upper substrate portion 41. Alternatively, the upper peripheral wall portion 46 may extend downward from a portion radially inward from the peripheral edge of the upper substrate portion 41.

[0035] The lower end portion 46a of the upper peripheral wall portion 46 is positioned above the upper end portion 36a of the lower peripheral wall portion 36 with a gap between them.

[0036] The sliding member 5 is positioned between the lower sliding material 32 of the lower support member 3 and the upper sliding material 42 of the upper support member 4. The sliding member 5 is placed on the lower base plate portion 31 of the lower support member 3. The sliding member 5 is slidable horizontally relative to the lower support member 3 and the upper support member 4.

[0037] Figure 4 is a cross-sectional view taken along line AA in Figure 3. As shown in Figure 4, in the normal state, in a plan view, the sliding member 5 is positioned approximately in the center of the lower support member 3 (and upper support member 4).

[0038] As shown in Figure 3, the sliding member 5 has a cylindrical portion (connecting portion) 51. The cylindrical portion 51 is formed in a cylindrical shape with the vertical direction as the axial direction. The cylindrical portion 51 is made of, for example, steel.

[0039] A lower sliding plate portion (lower wall portion) 53 is provided at the lower end of the cylindrical portion 51. The lower sliding plate portion 53 is formed in a flat plate shape. The plate surface of the lower sliding plate portion 53 is oriented in the vertical direction. In plan view, the lower sliding plate portion 53 is approximately circular in shape. In plan view, the outer circumference shape of the lower sliding plate portion 53 is approximately the same as the outer circumference shape of the cylindrical portion 51. The lower sliding plate portion 53 is made of a material such as Teflon®-based (PTFE: polytetrafluoroethylene) resin.

[0040] The lower surface of the lower sliding plate portion 53 is a lower sliding surface 53a formed in a flat shape. The lower sliding surface 53a contacts the lower sliding surface 32a of the lower support member 3 and is slidable relative to the lower sliding surface 32a.

[0041] An upper sliding plate portion (upper wall portion) 55 is provided at the upper end of the cylindrical portion 51. The lower sliding plate portion 53 and the upper sliding plate portion 55 are connected by the cylindrical portion 51. The upper sliding plate portion 55 is formed in a flat plate shape. The plate surface of the upper sliding plate portion 55 is oriented in the vertical direction. In plan view, the upper sliding plate portion 55 is approximately circular in shape. In plan view, the outer circumference shape of the upper sliding plate portion 55 is approximately the same as the outer circumference shape of the cylindrical portion 51. The upper sliding plate portion 55 is made of a material such as Teflon® (PTFE: polytetrafluoroethylene), which is a resin.

[0042] The upper surface of the upper sliding plate portion 55 is a flat upper sliding surface 55a. The upper sliding surface 55a contacts the upper sliding surface 42a of the upper support member 4 and is slidable relative to the upper sliding surface 42a.

[0043] When the displacement suppression device 1 is also used as a sliding bearing, it is preferable that the friction coefficient μ of the lower sliding surface 53a and the upper sliding surface 55a is 0.1 or less.

[0044] A cushioning material 57 is provided on the outer circumferential surface 51a of the cylindrical portion 51. The cushioning material 57 is provided along substantially the entire length of the cylindrical portion 51 in the vertical direction. The cushioning material 57 is provided around substantially the entire circumference of the outer circumferential surface 51a of the cylindrical portion 51. In a plan view, the cushioning material 57 is formed in an annular shape. The cushioning material 57 may also be provided only on a part of the cylindrical portion 51 in the vertical direction, or in a configuration where multiple cushioning materials are provided at intervals in the vertical direction of the cylindrical portion 51. The cushioning material 57 may also be provided in a configuration where multiple cushioning materials are provided at intervals in the circumferential direction on the outer circumferential surface 51a of the cylindrical portion 51. The cushioning material 57 is made of a rubber material such as natural rubber, high-damping rubber, or rubber chips.

[0045] When the sliding member 5 slides horizontally and collides with the lower peripheral wall portion 36 of the lower support member 3 and the upper peripheral wall portion 46 of the upper support member 4, the cushioning material 57 collides with the lower peripheral wall portion 36 and the upper peripheral wall portion 46, thereby mitigating the impact load. Note that the cushioning material 57 is not required to be provided on the sliding member 5.

[0046] Next, the movement of the displacement suppression device 1 during an earthquake will be explained. When displacement occurs in the seismic isolation layer 12 during a major earthquake, the sliding member 5 of the displacement suppression device 1 resists it like a shear key, preventing excessive displacement.

[0047] As shown in Figures 3 and 4, in the normal state, the clearance (distance between) between the sliding member 5 and the lower peripheral wall portion 36 of the lower support member 3 and the upper peripheral wall portion 46 of the upper support member 4 is δ.

[0048] Figure 5 is a vertical cross-sectional view showing the maximum displacement of the displacement suppression device 1 during an earthquake. Figure 6 is a cross-sectional view of line BB in Figure 5, with the upper support member 4 indicated by a dashed line. As shown in Figures 5 and 6, during an earthquake, when the displacement of the seismic isolation layer 12 (= relative displacement between the lower support member 3 and the upper support member 4) reaches 2δ, the sliding member 5 comes into contact with the lower peripheral wall portion 36 of the lower support member 3 and the upper peripheral wall portion 46 of the upper support member 4.

[0049] As shown in Figure 6, the first portion 57a ​​of the annular cushioning material 57 of the sliding member 5 abuts against the lower peripheral wall portion 36 of the lower support member 3, and the second portion 57b of the cushioning material 57, which is radially opposite to the first portion 57a, abuts against the upper peripheral wall portion 46 of the upper support member 4. The cushioning material 57 begins to collapse (compression deform) radially, and the stopper function is activated.

[0050] For example, if the outer diameter d of the cylindrical portion 51 of the sliding member 5 is 600 mm, the thickness e of the cushioning material 57 is 50 mm, and the normal clearance δ is 300 mm, the stopper function of the seismic isolation layer 12 begins to work when the displacement of the seismic isolation layer 12 reaches 600 mm. When the displacement of the seismic isolation layer 12 reaches 700 mm, the cushioning material 57 collapses, preventing further displacement, and the displacement of the seismic isolation layer 12 is suppressed. Generally, the seismic isolation layer displacement assumed in a large earthquake in the design is 600 mm or less, and the limit deformation of the laminated rubber bearing of the seismic isolation device is about 750 mm.

[0051] As shown in Figure 7, this figure shows the relationship between the displacement of the seismic isolation layer 12 and the reaction force of the displacement suppression device 1 when the load-bearing capacity and rigidity of the lower peripheral wall portion 36 of the lower support member 3 and the upper peripheral wall portion 46 of the upper support member 4 are large. Figure 8 shows the relationship between the displacement of the seismic isolation layer 12 and the reaction force of the displacement suppression device 1 when either the lower peripheral wall portion 36 of the lower support member 3 or the upper peripheral wall portion 46 of the upper support member 4 yields first at P1 and undergoes plastic deformation. When either the lower peripheral wall portion 36 or the upper peripheral wall portion 46 yields first before the buffer material 57 collapses and plastic deformation progresses, the hysteresis characteristics are as shown in Figure 8. In the hysteresis characteristics shown in Figure 8, compared to the case where the lower peripheral wall portion 36 and the upper peripheral wall portion 46 are sufficiently strong and do not yield (see Figure 7), the reaction force of the displacement suppression device 1 is small and the displacement of the seismic isolation layer 12 is large, and the acceleration generated in the building 16 is reduced.

[0052] Furthermore, as shown in Figure 4, the inner diameter of the lower support member 3 and the upper support member 4 (the diameter of the inner surface of the lower peripheral wall portion 36 and the upper peripheral wall portion 46) D = d + 2e + 2δ = 1300 mm. On the other hand, in the excessive deformation control device 20 described in Japanese Patent Application Publication No. 2020-193672 (Patent Document 2), the inner diameter of the annular portion 23 = diameter of the protruding portion 21 d + 2 × thickness of the rubber material 28 e + 2 × clearance δ × 2 = 1900 mm. The excessive deformation control device 20 described in Japanese Patent Application Publication No. 2020-193672 requires 2.13 times the installation area of ​​the displacement suppression device 1, which shows that the displacement suppression device 1 was made more compact (space-saving).

[0053] In the displacement suppression device 1 configured in this way, when the sliding member 5 slides against the lower support member 3 and the upper support member 4, the sliding member 5 comes into contact with the lower peripheral wall portion 36 of the lower support member 3 and the upper peripheral wall portion 46 of the upper support member 4, thereby suppressing the displacement of the seismic isolation layer 12. Since the sliding member 5 can slide in any direction in the horizontal plane, it is possible to suppress excessive displacement of the seismic isolation layer 12 in any direction in the horizontal plane.

[0054] Furthermore, since the sliding member 5 is displaced relative to the lower support member 3 and the upper support member 4, the relative displacement between the sliding member 5 and the lower support member 3 and the relative displacement between the sliding member 5 and the upper support member 4 is only half the displacement of the seismic isolation layer 12, thus reducing the planar size and installation space of the displacement suppression device 1.

[0055] Furthermore, in a plan view, the displacement suppression device 1 can be installed inside the building 16, such as in the center of the building 16, thus increasing the flexibility in selecting the installation location.

[0056] Furthermore, a cushioning material 57 is provided on the outer circumferential surface of the cylindrical portion 51 of the sliding member 5. Therefore, when the sliding member 5 collides with the lower peripheral wall portion 36 and the upper peripheral wall portion 46, the cushioning material 57 provided on the outer circumferential surface of the cylindrical portion 51 of the sliding member 5 collides with the lower peripheral wall portion 36 and the upper peripheral wall portion 46, thereby mitigating the impact load during the collision and reducing the acceleration generated in the building 16.

[0057] Further, the cylindrical portion 51 of the sliding member 5 is formed in a cylindrical shape with the vertical direction as the axial direction. Therefore, the sliding member 5 formed in a cylindrical shape can slide in any direction (arbitrary direction) within the horizontal plane.

[0058] Also, if the yield strength and rigidity of the lower peripheral wall portion 36 of the lower receiving member 3 and the upper peripheral wall portion 46 of the upper receiving member 4 are made sufficiently large, they will serve as stoppers for keeping the displacement of the seismic isolation layer 12 within a predetermined range. Further, if the upper peripheral wall portion 46 and the lower peripheral wall portion 36 yield (P1 < P2) under the horizontal forces P1 and P2 (P1: the force at which the upper peripheral wall portion 46 yields, P2: the force at which the lower peripheral wall portion 36 yields), when the stopper reaction force exceeds P1, the upper peripheral wall portion 46 will undergo plastic deformation and absorb seismic energy, thereby suppressing excessive displacement of the seismic isolation layer 12. In this case, since the upper peripheral wall portion 46 is damaged, it will need to be replaced after the earthquake.

[0059] Also, since the lower sliding surface 32a of the lower sliding member 32 of the lower receiving member 3 and the upper sliding surface 42a of the upper sliding member 42 of the upper receiving member 4 are formed in a planar shape, manufacturing is easier and the manufacturing cost can be suppressed compared to those formed in a spherical shape as in the prior art.

[0060] (Modification Example 1) Next, a displacement suppression device according to Modification Example 1 of the above-described embodiment will be mainly described with reference to FIG. 9. In the following modification examples, the same members as those used in the above-described embodiment are denoted by the same reference numerals, and their descriptions are omitted.

[0061] As shown in FIG. 9, in the displacement suppression device 1A according to this modification example, a lower buffer material (buffer material) 37 is provided on the inner peripheral surface 36b of the lower peripheral wall portion 36 of the lower receiving member 3A. An upper buffer material (buffer material) 47 is provided on the inner peripheral surface 46b of the upper peripheral wall portion 46 of the upper receiving member 4A. The sliding member 5A is not provided with a buffer material. Note that the sliding member 5A may also be provided with a buffer material 57 on the outer peripheral surface 51a of the cylindrical portion 51, similar to the above-described embodiment.

[0062] The lower cushioning material 37 is provided along approximately the entire length in the vertical direction of the lower peripheral wall portion 36 of the lower support member 3A. The lower cushioning material 37 is provided along approximately the entire circumference of the inner peripheral surface 36b of the lower peripheral wall portion 36. In plan view, the lower cushioning material 37 is formed in an annular shape.

[0063] The upper cushioning material 47 is provided along approximately the entire length in the vertical direction of the upper peripheral wall portion 46 of the upper support member 4A. The upper cushioning material 47 is provided along approximately the entire circumference of the inner peripheral surface 46b of the upper peripheral wall portion 46. In plan view, the upper cushioning material 47 is formed in an annular shape.

[0064] The lower cushioning material 37 and the upper cushioning material 47 may be provided only on a portion of the lower peripheral wall portion 36 and the upper peripheral wall portion 46 in the vertical direction, or multiple cushioning materials may be provided on the lower peripheral wall portion 36 and the upper peripheral wall portion 46 with spacing between them in the vertical direction. The lower cushioning material 37 and the upper cushioning material 47 may also be provided on the inner peripheral surfaces 36b, 46b of the lower peripheral wall portion 36 and the upper peripheral wall portion 46 with spacing between them in the circumferential direction.

[0065] When the sliding member 5A slides horizontally and collides with the lower peripheral wall portion 36 of the lower support member 3A and the upper peripheral wall portion 46 of the upper support member 4A, the impact load is mitigated by the sliding member 5 colliding with the lower cushioning material 37 and the upper cushioning material 47.

[0066] In the displacement suppression device 1A configured in this way, when the sliding member 5A slides against the lower support member 3A and the upper support member 4A, the sliding member 5A comes into contact with the lower buffer material 37 provided on the lower peripheral wall portion 36 of the lower support member 3A and the upper buffer material 47 provided on the upper peripheral wall portion 46 of the upper support member 4A, thereby suppressing the displacement of the seismic isolation layer 12. Since the sliding member 5A can slide in any direction in the horizontal plane, it is possible to suppress excessive displacement of the seismic isolation layer 12 in any direction in the horizontal plane.

[0067] Furthermore, since the sliding member 5A is displaced relative to the lower support member 3A and the upper support member 4A, the relative displacement between the sliding member 5A and the lower support member 3A, and the relative displacement between the sliding member 5A and the upper support member 4A, is only half the displacement of the seismic isolation layer 12, thus reducing the planar size and installation space of the displacement suppression device 1A.

[0068] Furthermore, a lower cushioning material 37 is provided on the inner surface 36b of the lower peripheral wall portion 36 of the lower support member 3A, and an upper cushioning material 47 is provided on the inner surface 46b of the upper peripheral wall portion 46 of the upper support member 4A. Therefore, when the sliding member 5A collides with the lower peripheral wall portion 36 and the upper peripheral wall portion 46, the sliding member 5A collides with the lower cushioning material 37 provided on the inner surface 36b of the lower peripheral wall portion 36 and the upper cushioning material 47 provided on the inner surface 46b of the upper peripheral wall portion 46, thereby mitigating the impact load during the collision and reducing the acceleration generated in the building 16.

[0069] (Modification 2) Next, a displacement suppression device according to a modified example 2 of the above-described embodiment will be explained, mainly with reference to Figure 10.

[0070] As shown in Figure 10, in the lower support member 3B of the displacement suppression device 1B according to this modified example, the lower base plate portion 31B is formed in a substantially rectangular shape in plan view. Bolt holes 34 are formed at the corners of the lower base plate portion 31B. Bolts (not shown) inserted through the bolt holes 34 are fastened to the foundation 11.

[0071] The lower peripheral wall portion 36 extends upward from the inside of the peripheral edge of the lower base plate portion 31B. A lower sliding material 32 is arranged inside the lower peripheral wall portion 36. The lower sliding material 32 is fixed to the lower base plate portion 31B. The upper support member 4B is a configuration in which the lower support member 3B is inverted, and its description is omitted.

[0072] In the displacement suppression device 1B configured in this way, when the sliding member 5 slides against the lower support member 3B and the upper support member 4B, the sliding member 5 comes into contact with the lower peripheral wall portion 36 of the lower support member 3B and the upper peripheral wall portion 46 of the upper support member 4B, thereby suppressing the displacement of the seismic isolation layer 12. Since the sliding member 5 can slide in any direction in the horizontal plane, it is possible to suppress excessive displacement of the seismic isolation layer 12 in any direction in the horizontal plane.

[0073] Furthermore, since the sliding member 5 is displaced relative to the lower support member 3B and the upper support member 4B, the relative displacement between the sliding member 5 and the lower support member 3B and the relative displacement between the sliding member 5 and the upper support member 4B is only half the displacement of the seismic isolation layer 12, thus reducing the planar size and installation space of the displacement suppression device 1B.

[0074] It should be noted that the assembly procedure, or the various shapes and combinations of each component shown in the above-described embodiment, are merely examples and can be modified in various ways based on design requirements, etc., without departing from the spirit of the present invention.

[0075] For example, the displacement suppression device 1 can be installed at the column position (directly below the column) and can also be a sliding bearing (which also has a stopper function). However, since the displacement of the sliding member 5 may generate a moment, it is desirable to keep the load small.

[0076] Furthermore, the displacement suppression device 1 may be installed in a location without columns (not directly below a column) and may only function as a stopper without supporting axial force. In this case, under normal circumstances, the upper surface of the sliding member 5 (upper sliding surface 55a) is not in close contact with the sliding surface (upper sliding surface 42a of the upper support member 4) and there is a gap, and it is sufficient that the upper surface of the sliding member 5 can slide against the sliding surface during an earthquake.

[0077] Furthermore, the displacement suppression device 1 can be applied not only to newly constructed structures but also to existing seismic isolation structures, and can be installed in the seismic isolation layer of existing seismic isolation structures. [Explanation of Symbols]

[0078] 1, 1A, 1B... Displacement suppression device 3, 3A, 3B... Lower support member (lower component) 4, 4A, 4B... Upper support member (upper component) 5,5A...Sliding member 11…Foundation (substructure) 16…Building (superstructure) 31, 31B... Lower circuit board section 32... Lower sliding material 32a... Lower sliding surface 36...Lower peripheral wall part 36b…Inner peripheral surface 37…Lower buffer material (buffer material) 41…Upper circuit board section 42…Upper sliding material 42a... Upper sliding surface 46...Upper peripheral wall part 46b…Inner peripheral surface 47...Top cushioning material (buffering material) 51…Cylindrical section (connecting section) 51a...Outer surface 53...Lower sliding plate section (lower wall section) 53a...Lower sliding surface 55…Upper sliding plate section (upper wall section) 55a... Upper sliding surface 57...Cushioning material

Claims

1. A displacement suppression device installed between a lower structure and a superstructure that is movable relative to the lower structure, Lower member and The upper member and The system includes a sliding member disposed between the lower member and the upper member, which is slidable relative to the lower member and the upper member. The aforementioned lower member is A lower substrate portion is provided at the top, having a planar lower sliding surface, and is fixed to the lower structure. It has a lower peripheral wall portion extending upward from the lower substrate portion, The aforementioned upper member is An upper sliding surface formed in a planar shape is provided at the bottom, and the upper substrate portion is fixed to the upper structure, It has an upper peripheral wall portion extending downward from the upper substrate portion, The sliding member is, A lower wall portion is provided with a lower sliding surface that is slidable with respect to the lower sliding surface and is formed in a planar shape, An upper wall portion is provided with an upper sliding surface that is slidable with respect to the upper sliding surface and is formed in a planar shape, It has a connecting portion that connects the lower wall portion and the upper wall portion, When the sliding member slides against the lower member and the upper member, the sliding member can come into contact with the lower peripheral wall and the upper peripheral wall. In a plan view, it is installed inside the superstructure and can be installed at any position regardless of the position of the columns of the superstructure. A displacement suppression device configured such that either the lower peripheral wall portion or the upper peripheral wall portion yields first, allowing plastic deformation to proceed.

2. The displacement suppression device according to claim 1, wherein a cushioning material is provided on the outer circumferential surface of the connecting portion.

3. The displacement suppression device according to claim 1 or 2, wherein a cushioning material is provided on the inner surface of the lower peripheral wall portion and the upper peripheral wall portion.

4. The displacement suppression device according to any one of claims 1 to 3, wherein the connecting portion is formed in a cylindrical shape with the vertical direction as the axial direction.

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