JP7432318B2 - Seismic isolation buildings and seismic isolation systems - Google Patents

Description

The present invention relates to a seismic isolation building and a seismic isolation system that suppress seismic force applied to a building during an earthquake.

A seismic isolation device for suppressing seismic force applied to a building during an earthquake is known. The seismic isolation device is provided in a seismic isolation layer between an upper structure to be seismically isolated and a lower structure separated from the upper structure. The seismic isolation device is configured so that, when the upper structure and the lower structure move relative to each other during an earthquake, a restoring force acts to return the upper structure to its original position.

The applicant has already developed a seismic isolation bearing that includes a V-shaped rail, a sliding plate provided on the rail, and a slider provided with a sliding member so as to slide on the sliding plate. This has already been proposed (for example, see Patent Document 1). According to this seismic isolation support, a rail is provided on the foundation on the ground side, and a slider is provided on the side of the building to be seismically isolated so that the slider slides on the inclined rail. According to this seismic isolation support, as the building is displaced in the horizontal direction during an earthquake, the building is displaced upward, and the gravitational force acting on the building generates a restoring force that tends to return the building to its original position.

Japanese Patent Application Publication No. 2017-145839

It is assumed that a Nankai Trough earthquake or a direct earthquake will occur in the future, and depending on the construction site, buildings are expected to be subject to extremely large seismic motions. However, for buildings to which inclined sliding bearings are applied, reducing the coefficient of friction can improve the seismic isolation effect when subjected to earthquake motion, but there is a risk that the damping effect of shaking will decrease when subjected to large earthquake motion. be. Furthermore, in buildings to which inclined sliding bearings are applied, if the friction coefficient of the inclined sliding bearings is small, there is a risk that the building may move when wind loads act on the building.

If dampers are added to a building with a seismic isolation structure to increase the amount of attenuation in order to cope with large seismic motions, the effectiveness of seismic isolation against small and medium-sized earthquakes that occur frequently will be impaired. In Patent Document 1, the damper effect of the inclined sliding bearing has not yet been proposed. The applicant has been diligently researching ways to further enhance the effectiveness of seismic isolation.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a seismic isolation building and a seismic isolation system that can suppress seismic force through seismic isolation and increase attenuation according to the magnitude of seismic motion. shall be.

In order to achieve the above object, the present invention comprises: a lower structure constructed on the ground side and displaced in conjunction with the ground; an upper structure movable relative to the lower structure; an inclined sliding support that supports the upper structure so that the amount of vertical movement of the upper structure increases in accordance with the increase in the amount of movement of the upper structure in the horizontal direction; and the upper structure or the lower structure. a sliding plate attached to interlock with either one of the upper structure or the lower structure; and a sliding plate attached to the other of the upper structure or the lower structure and abutting the sliding plate and horizontally adjusting the upper structure. A sliding support comprising: a moving part that slides in a horizontal direction relative to the sliding plate in conjunction with the movement in the direction; and an elastic body that biases the moving part in a direction to press the sliding plate against the sliding plate. and, the sliding bearing is configured to move the sliding support via the elastic body as the amount of vertical movement of the upper structure increases in accordance with the increase in the amount of movement of the upper structure in the horizontal direction. The damping force increases as the displacement of the upper structure increases, using the effect of increasing the frictional resistance force between the moving part and the sliding plate by increasing the pressing force that presses the moving part against the sliding plate. between the upper surface of the upper structure and a roof plate extending from the lower structure, or between a protrusion projecting from a side surface of the upper structure and a roof plate extending from the lower structure; It is a seismically isolated building that is characterized by being installed between the board and the board .

According to the present invention, the force acting on the upper structure caused by the earthquake force is suppressed by the inclined sliding bearing, and the sliding bearing presses the moving part against the sliding plate to generate a frictional resistance force and functions as a damper. This can increase the seismic isolation capacity of the building.
In addition, in sliding bearings, the frictional resistance force is increased by increasing the pressing force against the sliding plate of the moving part as the displacement of the moving body increases, thereby creating a variable damping damper that increases the damping force as the displacement of the moving body increases. realizable.

Furthermore, in order to achieve the above object, the present invention provides for controlling the amount of horizontal movement of an upper structure that is constructed on the ground side and is movable relative to a lower structure that is displaced in conjunction with the ground. an inclined sliding bearing that supports the upper structure so that the amount of vertical upward movement of the upper structure increases in accordance with the increase in the amount of movement of the upper structure; an attached sliding plate; and a sliding plate that is attached to be interlocked with either the upper structure or the lower structure, abuts the sliding plate, and moves in conjunction with the horizontal movement of the upper structure. a sliding support having a moving part that slides horizontally relative to the sliding plate ; and an elastic body that biases the moving part in a direction to press the sliding plate, the sliding bearing comprising: As the amount of vertical movement of the upper structure increases in accordance with the increase in the amount of movement of the upper structure in the horizontal direction, a pressing force that presses the moving part against the sliding plate via the elastic body is increased. By using the effect of increasing the frictional resistance between the moving part and the sliding plate, the damping force increases as the displacement of the upper structure increases, so that it functions as a variable damping damper. Provided between the upper surface of the upper structure and a roof plate extending from the lower structure, or between a protrusion projecting from a side surface of the upper structure and a top plate extending from the lower structure. This is a seismic isolation system characterized by:

According to the present invention, the force acting on the upper structure caused by the earthquake force is suppressed by the inclined sliding bearing, and the sliding bearing presses the moving part against the sliding plate to generate a frictional resistance force and functions as a damper. This can increase the seismic isolation capacity of the building.

According to the present invention, seismic force can be suppressed by seismic isolation, and the amount of attenuation can be increased according to the magnitude of seismic motion.

1 is a schematic diagram showing the configuration of a seismically isolated building according to an embodiment of the present invention. It is a figure showing the composition of an inclined sliding bearing. It is a figure showing the composition of a sliding bearing. FIG. 2 is a schematic diagram showing the behavior of a seismically isolated building during an earthquake. FIG. 3 is a diagram showing the operation of a sliding bearing during an earthquake. It is a diagram showing a history loop of a seismically isolated building. It is a diagram showing a seismically isolated building according to a modified example. It is a figure which shows the operation|movement of the seismic isolation building based on the modified example at the time of an earthquake.

Hereinafter, embodiments of a seismic isolation building and a seismic isolation system according to the present invention will be described with reference to the drawings. A seismic isolation building is a structure whose seismic force is isolated by a seismic isolation system.

As shown in FIG. 1, the seismic isolation building 1 includes a building 2 to be seismically isolated and a seismic isolation system 30 that seismically isolates the building 2. The building 2 includes a structure 3 that is subject to seismic isolation, and a foundation 8 that supports the structure 3. The seismic isolation system 30 includes an inclined sliding support 31 that supports the lower part of the structure 3 and a sliding support 35 that supports the structure 2.

The structure 3 is formed into a box shape. The structure 3 is an upper structure that is formed separately from a foundation 8 that includes a lower structure. The structure 3 may have one floor or may have a plurality of floors inside. The structure 3 is movably supported by a foundation 8 via an inclined sliding support 31. The structure 3 includes a floor plate 4 provided below, a wall plate 5 provided to cover the periphery of the floor plate 4, and a ceiling plate 6 provided above the wall plate 5.

The floorboard 4 is formed into a rectangular plate shape. The floorboard 4 is formed, for example, by attaching a plate-like body to a frame made of steel. Four wall boards 5 are provided standing upward from the four sides around the floor board 4. The wall plate 5 is formed into a rectangular plate shape. The wall board 5 is formed by attaching a plate-like body to a frame made of steel, for example. A window may be formed in the wall plate 5. A ceiling board 6 is provided at the top so as to cover a space surrounded by four wall boards 5.

The ceiling plate 6 is formed into a rectangular plate shape. The ceiling plate 6 is formed by attaching a plate-like body to a frame made of steel, for example. The structure 3 includes a floor plate 4, a wall plate 5, and a ceiling plate 6 that are integrally formed. The floor plate 4 is supported by the foundation 8 via an inclined sliding support 31. The ceiling plate 6 may be provided with a skylight for letting in outside light.

The foundation 8 is constructed on the ground E side. The foundation 8 displaces in conjunction with the ground E during an earthquake. The foundation 8 includes a base 9 that supports the structure 3 and an outer shell 10 formed to cover the structure 3. The foundation 9 is a lower structure constructed on the ground E side. The base 9 is made of reinforced concrete, for example. An outer shell 10 is integrally provided on the upper part of the base 9. The outer shell 10 is, for example, a frame made of a steel frame or the like. The outer shell 10 includes four outer walls 11 that surround the structure 3.

The outer wall 11 is formed into a rectangular plate shape by, for example, a plate-shaped body or glass attached to a frame. The four outer walls 11 are provided to stand upward from the periphery of the base 9. A gap T1 is formed between the outer wall 11 and the wall plate 5. A roof plate 12 is provided on the top of the four outer walls 11. The roof plate 12 is formed into a rectangular plate shape.

The roof plate 12 is provided above the four outer walls 11 so as to cover the space formed by the four outer walls 11. The roof plate 12 may be provided with an opening 13. A roof may be provided to cover the opening 13 above. A gap T2 is formed between the roof plate 12 and the ceiling plate 6 of the structure 3. A sliding support 35 for supporting the roof plate 12 is provided between the roof plate 12 and the ceiling plate 6 of the structure 3.

Next, the inclined sliding bearing 31 and sliding bearing 35 of the seismic isolation system 30 will be explained.

The inclined sliding support 31 is a seismic isolation mechanism that can support the structure 3 in the vertical direction and flexibly displace it in the horizontal direction. The inclined sliding support 31 is configured such that the amount of upward movement in the vertical direction increases as the amount of movement in the horizontal direction of the structure 3, which is movable relative to the base 9 provided on the ground E, increases. I support 3. The inclined sliding support 31 is provided between the base 9 and the structure 3. For example, four inclined sliding bearings 31 are provided between the base 9 and the structure 3 to support the four corners of the structure 3. Four or more inclined sliding bearings 31 may be provided.

The slope sliding support 31 includes, for example, a slope support member 32A provided on the base 9, a slope support member 32B fixed to the lower surface side of the floorboard 4 of the structure 3, and a slope support member 32A and a slope support member 32B. and a moving member 32C provided between the two. The inclined support member 32A and the inclined support member 32B are arranged so that their longitudinal directions are perpendicular to each other when viewed from above. The base 9 and the floor plate 4 are constructed to be relatively movable in the horizontal direction via an inclined sliding support 31. The base 9 and the floorboard 4 undergo relative displacement upward in the vertical direction in accordance with the amount of relative displacement in the horizontal direction.

The inclined support member 32A is, for example, formed into a rod shape with a rectangular cross section. The inclined support member 32A is arranged such that its longitudinal direction is along one side of the structure 3. The inclined support member 32A is formed with V-shaped inclined surfaces 32A1 and 32A2 that are inclined upwardly from the center of the upper surface toward both ends when viewed from the side in a direction orthogonal to the longitudinal direction. The angles of inclination of the inclined surface 32A1 and the inclined surface 32A2 with respect to the horizontal plane are formed such that their absolute values are each a predetermined value θ. The surfaces of the inclined surfaces 32A1 and 32A2 are coated with a resin sliding material such as polytetrafluoroethylene (PTFE), so-called Teflon (registered trademark), to reduce the coefficient of friction. A sliding material such as a stainless steel plate may be attached to the surfaces of the inclined surface 32A1 and the inclined surface 32A2.

A moving member 32C is placed above the inclined surface 32A1 and the inclined surface 32A2. The moving member 32C is formed in a block shape. The moving member 32C is formed to be wider than the inclined support member 32A when viewed from the lateral direction of the inclined support member 32A. A step D1 is formed below the moving member 32C so that the inclined support member 32A is sandwiched and fitted in the width direction when viewed from the lateral direction of the inclined support member 32A.

The movable member 32C has V-shaped inclined surfaces 32C1 and 32C2 formed in the step D1 so as to protrude downward toward the center. A sliding material such as Teflon is pasted on the surfaces of the inclined surface 32C1 and the inclined surface 32C2 to reduce the coefficient of friction. The angles of inclination of the inclined surface 32C1 and the inclined surface 32C2 with respect to the horizontal plane are formed such that their absolute values are each a predetermined value θ. The inclined surface 32C1 and the inclined surface 32C2 are in contact with the inclined surface 32A1 and the inclined surface 32A2.

The moving member 32C is formed to be wider than the inclined support member 32B when viewed from the lateral direction of the inclined support member 32B. A step D2 is formed above the moving member 32C so that the inclined support member 32B is sandwiched and fitted in the width direction when viewed from the lateral direction of the inclined support member 32B. The movable member 32C has inverted V-shaped inclined surfaces 32C3 and 32C4 formed in the step D2 so as to protrude upward toward the center. The surfaces of the inclined surfaces 32C3 and 32C4 are coated with a sliding material such as Teflon to reduce the coefficient of friction. A sliding material such as a stainless steel plate may be attached to the surfaces of the inclined surface 32C3 and the inclined surface 32C4.

The inclined surfaces 32C3 and 32C4 are formed in a direction perpendicular to the inclined surfaces 32C1 and 32C2 in a plan view. A sliding material such as Teflon for reducing the coefficient of friction is pasted on the surfaces of the inclined surface 32C3 and the inclined surface 32C4. An inclined support member 32B is placed above the inclined surface 32C1 and the inclined surface 32C2.

For example, it is formed into a bar shape with a rectangular cross section. The inclined support member 32B is a member having the same shape as the inclined support member 32A, and is arranged upside down. The inclined support member 32B is disposed such that its longitudinal direction is orthogonal to the longitudinal direction of the inclined support member 32A. The inclined support member 32A is formed with inverted V-shaped inclined surfaces 32B1 and 32B2 which are inclined downward from the center of the lower surface toward both ends when viewed from the side in a direction perpendicular to the longitudinal direction. The angles of inclination of the inclined surface 32B1 and the inclined surface 32B2 with respect to the horizontal plane are formed such that their absolute values are each a predetermined value θ.

The surfaces of the inclined surfaces 32B1 and 32B2 are coated with a sliding material such as Teflon to reduce the coefficient of friction. In addition to friction coating, a sliding material such as a stainless steel plate may be attached to the surfaces of the inclined surface 32B1 and the inclined surface 32B2. A moving member 32C is arranged below the inclined surface 32B1 and the inclined surface 32B2, and the inclined surface 32C3 and the inclined surface 32C4 are in contact with each other.

Next, the sliding bearing 35 will be explained.

The sliding support 35 is a damper mechanism that supports the roof plate 12 and suppresses an increase in the vertical upward movement of the structure 3 (see FIG. 1). For example, four sliding supports 35 are provided between the outer shell 10 and the ceiling plate 6 of the structure 3 in order to support the four corners of the upper surface of the ceiling plate 6. The sliding support 35 may be provided at a location other than the four corners of the upper surface of the ceiling plate 6.

As shown in FIG. 3, the sliding support 35 includes a sliding plate 36 attached to the structure 3 so as to be interlocked with the sliding plate 3, a moving part 37 that contacts the sliding plate 36, and a moving part 37 relative to the sliding plate 36. It has a spring 40 that urges in the pressing direction. The sliding plates 36 are attached, for example, to the four corners of the upper surface side of the ceiling plate 6 of the structure 3. The sliding plate 36 may be attached to a location other than the four corners on the upper surface side of the ceiling plate 6. The sliding plate 36 is formed into a rectangular plate shape. The sliding plate 36 is made of, for example, a stainless steel plate.

A moving part 37 is in contact with the upper surface of the sliding plate 36. The moving part 37 slides in the horizontal direction relative to the sliding plate in conjunction with the horizontal movement of the structure 3. The moving part 37 has a main body part 38 and a sliding surface 39 formed on the main body part 38. The sliding surface 39 contacts the sliding plate 36 and slides on the sliding plate 36. For example, a sliding material such as Teflon is pasted on the sliding surface 39. The base end of the main body portion 38 is fixed to the lower surface side of the roof plate 12.

The main body portion 38 is formed of two cylindrical bodies 38A and 38B having different diameters so as to be expandable and retractable. A cylindrical body 38B is inserted into the cylindrical body 38A. The cylindrical body 38B is slidable relative to the cylindrical body 38A. A coiled spring 40 is inserted inside the main body portion 38 . The spring 40 is an elastic body, and other elastic bodies may be used as long as they have the same effect as the spring 40. The spring 40 biases the main body portion 38 in the direction of extension. That is, the spring 40 biases the sliding surface 39 in a direction to press it against the sliding plate 36.

Next, the operation of the seismic isolation system 30 will be explained. First, the operation of the inclined sliding bearing 31 will be explained.

As shown in FIG. 4, when an earthquake occurs, the foundation 9 moves horizontally, and the structure 3 tries to stay in place due to inertia, resulting in a relative gap between the structure 3 and the foundation 9. A horizontal displacement occurs. At this time, when the inclined support member 32B is displaced in the x-axis direction in conjunction with the displacement of the structure 3 in the x-axis direction, the moving member 32C is moved along with the inclined support member 32B move in the axial direction (see Figure 2). At this time, the movable member 32C moves in an upward direction with the inclined surface 32C2 sliding against the inclined surface 32A2 of the inclined support member 32A (see FIG. 2).

When the horizontal displacement is in the opposite direction, the inclined surface 32C1 of the movable member 32C slides against the inclined surface 32A1 of the inclined support member 32A, and the movable member 32C moves in the direction of ascending the slope. Accordingly, the inclined support member 32B placed on the moving member 32C is displaced upward in the vertical direction (see FIG. 2).

Further, when the inclined support member 32B is displaced in the y-axis direction in conjunction with the displacement of the structure 3 in the y-axis direction, the inclined surface 32B1 of the inclined support member 32B slides on the inclined surface 32C3 of the moving member 32C, and the slope rises. move in the upward y-axis direction (see Figure 2).

When the horizontal displacement is in the opposite direction, when the inclined support member 32B is displaced in the y-axis direction in conjunction with the displacement of the structure 3 in the y-axis direction, the inclined surface 32B2 of the inclined support member 32B moves against the inclined surface 32C4 of the moving member 32C. It slides and moves in the y-axis direction up the slope. The moving member 32C moves together with the inclined support member 32A relative to the inclined support member 32B, with the inclined support member 32A hooked on the step D1.

When the structure 3 moves in the horizontal direction, the movement of the inclined sliding support 31 causes a displacement upward in the vertical direction depending on the amount of movement in the horizontal direction. The potential energy of the structure 3 increases according to the amount of upward displacement of the structure 3 in the vertical direction. Gravity acts vertically downward on the structure 3 that has been displaced upward in the vertical direction, and a restoring force acts on the structure 3 to return it to its original position.

Then, a force acts on the moving member 32C to slide on the inclined surface 32A1 or the inclined surface 32A2 of the inclined support member 32A and return to the center of the inclined support member 32A. Similarly, a force acts on the moving member 32C, which slides on the inclined surface 32B1 or 32B2 of the inclined support member 32B and returns to the center of the inclined support member 32A. Due to the above-mentioned operation of the inclined sliding support 31, when a horizontal displacement occurs, a restoring force is generated in the structure 3 and the structure 3 returns to its original position.

Next, the operation of the sliding bearing 35 will be explained.

As shown in FIG. 5, when the structure 3 moves in the horizontal direction, the sliding plate 36 of the sliding support 35 moves in conjunction with the structure 3. The sliding surface 39 of the moving part 37 slides on the surface of the sliding plate 36 in conjunction with the movement of the structure 3 in the horizontal direction. As the amount of upward movement in the vertical direction increases in accordance with the amount of movement of the structure 3 in the horizontal direction, the distance between the roof plate 12 and the ceiling plate 6 becomes closer. In the moving part 37, as the distance between the roof plate 12 and the ceiling plate 6 becomes closer, the main body part 38 contracts, and the spring 40 is compressed (see FIG. 5(B)).

Then, the moving part 37 increases the pressing force that presses the sliding surface 39 against the sliding plate 36 according to the amount of movement of the structure 3 in the horizontal direction, and the frictional resistance generated between the sliding plate 36 and the sliding surface 39 increases. increase. Further, when the pressing force that presses the sliding surface 39 against the sliding plate 36 increases, the frictional resistance between the moving member 32C and the inclined support member 32A also increases in the inclined sliding bearing 31, and the moving member 32C and the inclined The frictional resistance between the support member 32B and the support member 32B increases. As a result, the sliding bearing 35 functions as a variable damper for seismic isolation in which the damping force increases as the displacement between the structure 3 and the outer shell 10 increases.

As shown in FIG. 6, the hysteresis loop caused by the frictional resistance force of the seismic isolation system 30 is represented by a butterfly shape. The seismic isolation system 30 is a variable attenuation damper whose damping force increases as the horizontal displacement of the structure 3 increases, and in the event of a huge earthquake, it increases the damping force and reduces the displacement of the seismic isolation building 1. In addition, the seismic isolation system 30 can reduce the damping force during small to medium earthquakes and enhance the seismic isolation effect of the seismic isolation building 1.

[Modified example]
The structure 3 of the seismically isolated building 1 does not necessarily need to be covered with the outer shell 10 if the influence of wind can be ignored. In the following description, the same names and numerals will be used for the same configurations as those of the above embodiment, and overlapping descriptions will be omitted as appropriate.

As shown in FIG. 7, the base isolation building 1 has a foundation 8 located underground. The structure 3 is provided with a protrusion 7 that protrudes outward from the wall plate 5 at the bottom. The foundation 8 is provided with a top plate 14 that covers the protrusion 7. The top plate 14 is provided at a height close to the ground surface. A sliding support 35 is provided between the protrusion 7 and the top plate 14.

As shown in FIG. 8, when the structure 3 moves horizontally during an earthquake and is displaced vertically upward, a damper effect of the frictional resistance generated by the sliding bearing 35 acts on the structure 3. .

As mentioned above, according to the seismic isolation building 1, by incorporating a variable attenuation damper whose damping force increases as the displacement increases, it can cope with large earthquakes that are unlikely to occur, while also dealing with small and medium-sized earthquakes that occur frequently. The seismic isolation effect can be enhanced. According to the seismic isolation building 1, by insulating the structure 3 from the wind load P by forming the outer shell 10, it is possible to adopt a low-friction type seismic isolation bearing, while reducing the influence of the wind. It is also possible to create buildings with high seismic isolation. In addition, according to the seismic isolation building 1, even if the outer shell 10 is not provided, the combination of the inclined sliding bearing 31 and the sliding bearing 35 with springs prevents displacement during a large earthquake without impairing the seismic isolation effect in small to medium earthquakes. It is possible to realize a seismic isolation structure that suppresses

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described one embodiment, and can be modified as appropriate without departing from the spirit thereof. For example, the sliding support 35 described above may be installed upside down. That is, the sliding plate 36 of the sliding support 35 may be attached to move with either the structure 3 or the ground E. Moreover, the seismic isolation building 1 may be applied to an intermediate structure that seismically isolates exhibits and the like inside the building.

1...Seismic isolation building, 2...Building, 3...Structure, 4...Floor plate, 5...Wall plate, 6...Ceiling plate, 7...Protrusion, 8...Foundation, 9...Foundation, 10...Outer shell, 11...Outer wall , 12... Roof plate, 13... Opening, 14... Top plate, 30... Seismic isolation system, 31... Inclined sliding support, 32A... Inclined support member, 32A1, 32A2... Inclined surface, 32B... Inclined support member, 32B1, 32B2... Inclined surface, 32C... Moving member, 32C1, 32C2, 32C3, 32C4... Inclined surface, 35... Sliding support, 36... Sliding plate, 37... Moving part, 38... Main body, 38A... Cylindrical body, 38B... Cylindrical body , 39...Sliding surface, 40...Spring, D1...Step, D2...Step, E...Ground

Claims (2)

a lower structure constructed on the ground side and displaced in conjunction with the ground;
an upper structure that is movable relative to the lower structure;
an inclined sliding support that supports the upper structure so that the amount of vertical movement of the upper structure increases in accordance with the increase in the amount of movement of the upper structure in the horizontal direction;
A sliding plate attached to interlock with either the upper structure or the lower structure, and a sliding plate attached to interlock with the other of the upper structure or the lower structure and abutting the sliding plate. a moving part that contacts and slides horizontally relative to the sliding plate in conjunction with the horizontal movement of the upper structure ; and a moving part that is biased in a direction to press the sliding plate against the sliding plate. an elastic body ; a sliding bearing having an elastic body;
The sliding support moves the moving part via the elastic body to the sliding plate as the amount of vertical movement of the upper structure increases in accordance with the increase in the amount of movement of the upper structure in the horizontal direction. As a variable damping damper, the damping force increases as the displacement of the upper structure increases, using the effect of increasing the frictional resistance between the moving part and the sliding plate by increasing the pressing force against the sliding plate. between the upper surface of the upper structure and a roof plate extending from the lower structure, or between a protrusion projecting from a side surface of the upper structure and a top plate extending from the lower structure, characterized by being provided in
Seismic isolation building. The upper structure moves upward in the vertical direction in response to an increase in the amount of movement in the horizontal direction of the upper structure, which is constructed on the ground side and is movable relative to the lower structure that moves in conjunction with the ground. an inclined sliding bearing that supports the superstructure in such a way that the amount increases;
A sliding plate attached to interlock with either the upper structure or the lower structure, and a sliding plate attached to interlock with the other of the upper structure or the lower structure and abutting the sliding plate. a moving part that contacts and slides horizontally relative to the sliding plate in conjunction with the horizontal movement of the upper structure ; and a moving part that is biased in a direction to press the sliding plate against the sliding plate. an elastic body ;
The sliding support moves the moving part via the elastic body to the sliding plate as the amount of vertical movement of the upper structure increases in accordance with the increase in the amount of movement of the upper structure in the horizontal direction. As a variable damping damper, the damping force increases as the displacement of the upper structure increases, using the effect of increasing the frictional resistance between the moving part and the sliding plate by increasing the pressing force against the sliding plate. between the upper surface of the upper structure and a roof plate extending from the lower structure, or between a protrusion projecting from a side surface of the upper structure and a top plate extending from the lower structure, characterized by being provided in
Seismic isolation system.

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