JP2013002206A - Rolling base isolation support device and base isolation structure system having base isolation support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To add the lift force action to a rolling base isolation device which uses a rigid oval rolling element having long periodicity, recovery property and attenuation property so as to improve the performance.SOLUTION: A rigid rolling element 7 of which surface curvature gradually changes in the shape of an oval rotor supports the load of an upper structure G between the upper structure G and a lower structure B and is arranged to have a movement range in the horizontal direction in an internal pressure room J, and ordinarily pressurizes the inside of the internal pressure room J maintaining the air tightness while a bar damper 10 which penetrates the central axis of the rolling element 7 and permits the displacement in the vertical direction is inserted into the rolling element 7.

Description

  The present invention is interposed between an upper structure in a building, artificial ground, etc. and a lower structure such as a foundation, and supports the load of the upper structure and reduces shaking of the upper structure against forced vibration such as earthquake motion. Seismic isolation device, so-called seismic isolation support device, and seismic isolation structure system in which the seismic isolation support device is installed between the upper structure and the lower structure, and more particularly between the upper structure and the lower structure The present invention relates to a so-called rolling seismic isolation device via a rolling element.

In the seismic isolation support device, which uses a rolling element such as a steel ball to perform seismic isolation, it is possible to obtain a sensitive response to seismic motion. There is also a problem of adding a return function to the original position after the earthquake motion.
From this point of view, the inventor previously provided an attenuation / restoration mechanism according to Japanese Patent Laid-Open No. 2005-273353 (Reference 1), Japanese Patent Application Laid-Open No. 2005-282247 (Reference 2), Japanese Patent Application Laid-Open No. 2006-153125 (Reference 3), and the like. A base-isolated base structure with constraining beams to prevent falls was proposed. However, in these techniques, the damping / restoring mechanism is complicated, and a special device such as a detection device is also required.
In view of this, the inventor of the present invention based on the knowledge that by making the rolling element into a spheroid, a return function can be provided and a longer period of oscillation can be achieved. Reference 4) (hereinafter referred to as the prior invention) proposed a rolling seismic isolation support device in which a damper steel bar is incorporated into a spheroid.
That is, according to the seismic isolation support device of the preceding invention, a spheroid rotator is interposed between the upper structure (building) G and the lower structure (foundation) B, and the spheroid is always present. The superstructure G is stably supported by the stable position state taken by the spheroid, and in the event of an earthquake, following the rolling characteristics of the spheroid, that is, following the rolling trajectory of the spheroid, the superstructure G has a longer period and returns by a return moment. In addition, the damper steel bar incorporated in the spheroid exhibits a damping action.

JP 2005-273353 A JP 2005-282247 A JP 2006-153125 A JP 2010-84910 A

The present invention is a further development of the prior invention, and is based on the idea that a more effective seismic isolation action can be obtained by adding a mechanism for reducing the load on the superstructure to the prior invention. .
Therefore, an object of the present invention is to obtain a rolling seismic isolation support device having a novel structure for arranging the mechanism around a rolling element.
It is another object of the present invention to obtain a seismic isolation structure system in which the novel seismic isolation support device is incorporated into the entire structure including the foundation.

Specifically, the rolling seismic isolation device of the present invention and the seismic isolation system having the seismic isolation device have the following configurations.
A first aspect of the present invention relates to a rolling seismic isolation support device, and as described in claim 1, is interposed between an upper structure and a lower structure that can move relative to each other in the horizontal direction, and the load of the upper structure is A seismic isolation support device that transmits to the lower structure and allows relative movement between the upper structure and the lower structure,
a. A rigid load receiving plate whose upper surface forms a smooth level surface is fixed to the upper surface of the lower structure,
b. On the lower surface of the upper structure, a rigid load supporting cylinder made of a cylindrical body having a cylindrical internal pressure chamber opened downward is fixed,
c. A sealing member that seals between the facing portions of the load supporting cylinder and the upper surface of the load receiving plate is fixed and held at the lower end of the cylindrical side wall portion,
d. In the internal pressure chamber of the load supporting cylinder, a rolling element made of a rigid body and having a spheroid shape whose surface curvature gradually changes has a moving area in the horizontal direction, and above and below the ceiling wall of the load supporting cylinder. Sandwiched between the lower surface of the portion and the upper surface of the load receiving plate, and arranged to support the load of the upper structure,
e. A filling fluid is sealed in a pressurized state in the internal pressure chamber in a fixed position state,
f. A rod-shaped damper insertion hole is formed along the central axis of the rolling element, and the rod-shaped damper insertion hole of the rolling element is in a fixed position on the load receiving plate and the ceiling wall portion of the load supporting cylinder. The rod-shaped damper insertion pipes having the rod-shaped damper insertion holes on the same straight line are arranged so as to maintain hermeticity. Become,
It is characterized by that.
In place of the f-term of the first invention, a rod-shaped damper insertion hole is opened along the central axis of the rolling element, and one end is fixed to the upper and lower part structures while maintaining the solidity, and the other end is A rolling seismic isolation support device in which a rod-shaped damper is inserted into a steel rod damper insertion hole constitutes another invention.

According to a second aspect of the present invention, there is provided a seismic isolation system, wherein the upper structure and the lower structure, which are movable relative to each other in the horizontal direction, are interposed between the upper structure and the lower structure. A seismic isolation structure system comprising a plurality of seismic isolation support devices that transmit to the structure and allow relative movement between the upper structure and the lower structure,
The seismic isolation support device is
a. A rigid load receiving plate whose upper surface forms a level surface is fixed to the upper surface of the lower structure,
b. On the lower surface of the upper structure, a rigid load supporting cylinder made of a cylindrical body having a cylindrical internal pressure chamber opened downward is fixed,
c. A sealing member that seals between a facing portion with a smooth surface formed on the upper surface of the load receiving plate is fixedly held at the lower end of the cylindrical side wall portion of the load supporting cylinder,
d. In the internal pressure chamber of the load supporting cylinder, a rolling element made of a rigid body and having a spheroid shape whose surface curvature gradually changes has a moving area in the horizontal direction, and above and below the ceiling wall of the load supporting cylinder. Sandwiched between the lower surface of the portion and the upper surface of the load receiving plate, and arranged to support the load of the upper structure,
e. A filling fluid is sealed in a pressurized state in the internal pressure chamber in a fixed position state,
f. A rod-shaped damper insertion hole is formed along the central axis of the rolling element, and the rod-shaped damper insertion hole of the rolling element is in a fixed position on the load receiving plate and the ceiling wall portion of the load supporting cylinder. The rod-shaped damper insertion pipes having the rod-shaped damper insertion holes on the same straight line are arranged so as to maintain hermeticity. Become,
It is characterized by that.
In the above description, the “plurality” of seismic isolation support devices refers to a quantity (for example, 3) that can support at least the superstructure independently, and is not limited to that quantity.
In place of the f-term of the second invention, a rod-shaped damper insertion hole is opened along the center axis of the rolling element, and one end is fixed to the upper and lower part structures while maintaining the solidity, and the other end is A seismic isolation structure system in which a rod-shaped damper is inserted into a steel rod damper insertion hole constitutes another invention.

In the first and second inventions and other inventions thereof, the “spheroid shape” is not limited to the spheroid (ellipsoid), but the surface curvature gradually changes, and the contact points on the upper and lower parallel surfaces as the rolling occurs. It includes all the shapes of spheres whose height between them gradually increases, and is specifically shown in the following embodiments. In addition, the “in-situ position state” refers to a normal state of the upper structure, in other words, a state of the upper structure that is mounted on the stable rolling element, that is, a stationary state of the upper structure.
When the upper structure takes the artificial ground, the building body is constructed on the artificial ground, and the artificial ground is supported by the lower structure as a foundation via the present rolling element.
In the first and second inventions and other inventions thereof,
1) The upper surface of the load receiving plate is made smooth on the contact surface with the sealing member, and the remaining upper surface of the load receiving plate and the lower surface of the ceiling surface of the load supporting cylinder are also made smooth. ,
2) In item f, a through-hole is provided along the center of the rolling element, and a rod-shaped damper insertion tube having a rod-shaped damper insertion hole in the through-hole is disposed in a binding manner.
3) In addition, in item f, the rod-shaped damper insertion tube disposed on the load receiving plate and the ceiling wall portion of the load supporting cylinder is attached to the lower surface of the load receiving plate and the upper surface of the ceiling wall portion of the load supporting cylinder. Those rod-shaped damper insertion holes are formed directly in the load receiving plate and the ceiling wall of the load supporting cylinder,
4) The rolling element is not limited to omnidirectional movement in the horizontal direction, and adopts a unidirectional displacement.
Is an embodiment appropriately taken.

(Function)
The rolling seismic isolation device of the present invention and the seismic isolation system having the seismic isolation device exhibit the following effects by adopting the above configuration.
The seismic isolation support device is interposed between a building (or artificial ground), that is, an upper structure G, and a concrete foundation, that is, a lower structure B. The load of the upper structure G is transmitted to the lower structure B in response to the lifting force (always) from the inner pressure chamber, and the seismic isolation action against the earthquake motion is exhibited by the rolling action of the rolling elements.
(A) Always At all times, the seismic isolation support device S is in a fixed position.
The internal pressure chamber is filled with a filling fluid at a predetermined pressure via a piping system communicating with the seismic isolation support device S, and the filling fluid in the internal pressure chamber does not leak to the outside due to the sealing member and other real actions. The pressure is maintained at a predetermined level. As a result, an uplift force acts on the upper structure G.
The rolling element is installed in a neutral state (in other words, a stable state) with the largest curvature surface up and down in a fixed position, and the load of the upper structure G is transmitted to and supported by the lower structure B via the rolling element. The At this time, the load of the superstructure G is reduced by receiving the lifting force, the load bearing force (stress) borne by the rolling element is small, and has long-term durability. The load (effective load) of the superstructure G reduced by receiving the lifting force is set within a range not affected by a small forcing force such as a wind load. In addition, the steel rod damper is unloaded in the fixed position state, but it is possible to further increase the lifting force by adopting an installation state showing resistance for a small forcing force such as a wind load.
The upper and lower support surfaces by the seismic isolation support device in this seismic isolation system maintain a stable state while maintaining all the rolling elements in a stable state, and the upper structure G maintains a stable state against wind loads and the like.

(B) At the time of an earthquake During the earthquake (and in all cases where a force that causes shaking is applied to the structure), the ground shakes greatly, and the foundation B as the substructure is integrated with the ground due to the forced displacement of the earthquake motion. Although the upper structure G vibrates, the upper structure G swings with the vertical movement through the rolling action of the rolling elements, and a relative displacement occurs between the upper structure G and the lower structure B. In the initial motion of this earthquake, the uplift force that has been acting at all times triggers the rolling element to roll, and the superstructure G is smoothly displaced. This upward lifting force is lost by the upward movement of the superstructure G.
The rolling element in contact with the upper structure G also rolls with the movement of the upper structure G, and the upper structure G supported by the rolling element follows the rolling locus of the rolling element. When the superstructure G moves in the reverse direction, the above operation is reversed.
With the earthquake motion, the superstructure G follows the rolling trajectory of the rolling element, and the swinging motion accompanied by the vertical movement is performed. As a result, the structure G receives a rocking action with a large period due to the rolling action of the rolling element. Adverse effects such as resonance due to earthquake motion can be avoided.
In addition, the rod-shaped damper is deformed along with the rolling of the rolling element, and a damping force is generated as the deformation energy is consumed. Further, a restoring force (restoring moment) is also generated due to the movement of the point of action due to the rolling movement of the rolling element. To do.
(B-1) For initial motion When there is an initial motion of large earthquake motion above a certain level, the superstructure G is apparently a small vertical load due to the action of the uplift force at all times, so the rolling elements under the superstructure G roll. The effect is immediate. In other words, this uplifting force triggers the rolling movement of the rolling elements, there is no delay to the initial motion of the earthquake, and then the effect of this uplifting force is lost, but the superstructure G by the following rolling elements is lost. Smoothly shifts to the rocking displacement.
(B-2) Damping action In this swinging displacement of the superstructure G and the integrated structure of the rolling element, the rod-shaped damper is inserted into the rod-shaped damper insertion tube of the load receiving plate and the rolling displacement of the rolling element to the left and right. It is pulled out from the rod-shaped damper insertion tube of the load supporting cylinder, and is pulled in and forcibly undergoes bending deformation. A damping force is exhibited by the energy dissipation effect by the bending action, and the vibration of the superstructure G is damped. In another aspect of the rod-shaped damper (claims 2 and 4), the upper and lower rod-shaped dampers are respectively pulled out from the rod-shaped damper insertion holes of the rolling elements, and are pulled in and forcibly subjected to bending deformation, and the damper action is performed. Demonstrate.
(B-3) Returning action With the rolling displacement of the rolling element, the upper contact on the rolling locus of the rolling element gradually moves upward (rises) when the structure G moves away from the original fixed position. A lifting force is applied to the upper structure G supported by the child. Moreover, in the return displacement from the uppermost point to the initial position (neutral position), it is in a descending state and rises again after passing the lowermost point.
During this time, an eccentric distance in the horizontal direction is generated between the lower contact and the upper contact, and an eccentric moment is generated with the lower contact as a supporting point due to the load of the upper structure G acting on the upper contact, and a restoring moment (2 in the opposite parallel direction) is generated. It functions as a return couple), that is, a return force. As a result, the upper structure G exhibits the characteristic of returning to the normal state, that is, the initial fixed position state, and the seismic isolation structure system returns to the stable state with the end of the forced horizontal force, that is, the seismic force.
(B-4)
As described above, the seismic isolation structure system acts on the structure at the time of an earthquake by realizing a long period of the structural system to avoid resonance with ground motion and receiving the damping function of the seismic isolation support device S. The ground motion is quickly attenuated, and the structure quickly returns to the initial position in response to a restoring moment (in other words, a return couple).
In addition, the initial motion of the seismic isolation is smoothed by the lifting force, and there is no impact on the superstructure G.

According to the seismic isolation support device of the present invention, it always has a lifting force function, exerts a load support action at all times and during an earthquake by a rolling element, and is used for relative movement between the upper structure and the lower structure during an earthquake. In addition to exerting seismic isolation action due to the longer period of the rolling displacement of the rolling element, the rod-shaped damper is bent and deformed in response to the rolling displacement of the rolling element, and exhibits damping force. This is an efficient seismic isolation support device that has multi-functionality that exerts restoring force due to couple action due to eccentricity of the mover and that incorporates a lifting force function.
Due to the uplifting action at all times, the load of the rolling element is reduced, the rolling element has a long-term sustainability, and the initial motion of the seismic isolation is smoothly performed during an earthquake, and there is no impact action on the superstructure G.
And in this seismic isolation support apparatus, it can cope with all the directions of a horizontal surface by making a rolling element hold | maintain a predetermined movement space.
Therefore, in a seismic isolation system that is provided with a plurality of the seismic isolation support devices and is held independently, the structure on the rolling element is supported stably at all times, and the natural period of the structural system during an earthquake is long. The damper function provided in the rolling element and the restoring force due to the couple action of the unique shape of the rolling element are exhibited, and an excellent seismic isolation effect is obtained, and the structural system is rapidly vibrated. Attenuation is realized. In addition, the load of the superstructure G is reduced by the uplifting action at all times, the long-term sustainability of the device of this seismic isolation system is ensured, and the initial action at the time of the earthquake is made smooth. There is no adverse effect on the superstructure G.

BRIEF DESCRIPTION OF THE DRAWINGS Side sectional drawing which shows schematic structure of the seismic isolation structure system incorporating the rolling seismic isolation support apparatus of one Embodiment of this invention. The vertical sectional view which shows the whole structure of this seismic isolation support apparatus (the partial expanded view of FIG. 1, the 2-2 sectional view taken on the line of FIG. 3). The plane block diagram which shows the whole structure of this seismic isolation support apparatus (3-3 line sectional drawing of FIG. 2). Detailed view of the seismic isolation support device (attachment of sealing member). The figure which shows the piping system of the filling fluid of this seismic isolation support apparatus. The schematic block diagram of the one aspect | mode (elliptical rotary body) of a rolling element. The schematic block diagram of another aspect of a rolling element. Detailed view of the seismic isolation support device (installation of steel bar damper). The example of arrangement | positioning to this building of this seismic isolation support apparatus is shown, (a) A figure is the side view, (b) A figure is the top view. The example of arrangement | positioning to the artificial ground of this seismic isolation support apparatus is shown, (a) The figure is the side view, (b) The figure is the top view. The figure which shows operation | movement of this seismic isolation support apparatus. The figure which shows operation | movement of this seismic isolation support apparatus. The figure which shows the attachment aspect of the other rod-shaped damper of this invention.

DESCRIPTION OF EMBODIMENTS Embodiments of a rolling seismic isolation device and a seismic isolation system having the seismic isolation device of the present invention will be described with reference to the drawings.
FIGS. 1-8 shows one Embodiment of the rolling seismic isolation support apparatus (henceforth "seismic isolation support apparatus") S which comprises this seismic isolation system. That is, FIG. 1 shows a schematic configuration of a seismic isolation system in which a plurality of the seismic isolation support devices S are incorporated, FIG. 2 shows a single longitudinal sectional configuration of the seismic isolation support device S, and FIG. 3 shows a plan configuration thereof. 4 to 8 show a partial configuration of the apparatus and a detailed configuration of the characteristic portion thereof. 9 and 10 show the arrangement of the apparatus, and FIGS. 11 and 12 show the operation of the apparatus.
In the illustration of this apparatus, X indicates a longitudinal direction, Y indicates a width direction, and Z indicates a height direction.
Therefore, the rolling seismic isolation support device S is installed in the upper structure G and the lower structure B, reduces and supports the load of the upper structure G, transmits it to the lower structure B, and is generated by a forced vibration force such as an earthquake. Seismically isolated against the shaking of the superstructure G.
As shown in the drawing, the seismic isolation support device S of the present embodiment is
a. A rigid load receiving plate 1 fixed on the upper surface of the lower structure B, the upper surface forming a level surface;
b. A rigid load-supporting cylindrical body 2 comprising a cylindrical body having a cylindrical internal pressure chamber J fixed to the lower surface of the upper structure G and opened downward;
c. A sealing member 3 which is fixedly held at the lower end of the cylindrical side wall portion of the load supporting cylinder 2 and seals between a facing portion with a smooth surface formed on the upper surface of the load receiving plate 1;
d. A supply pipe 4, a discharge pipe 5, which is arranged to penetrate through the wall portion of the load support cylinder 2 and supply and discharge the filling fluid K to and from the internal pressure chamber J;
e. It is composed of a rigid ellipsoid and is sandwiched between the load receiving plate 1 and the load support cylinder 2 to support the load of the upper structure G, and the inside of the internal pressure chamber J of the load support cylinder 2 A rolling element 7 arranged with a moving area in the horizontal direction,
f. A steel rod damper insertion tube 9 which is arranged through each of the rolling element 7, the load receiving plate 1, and the load supporting cylinder 2 independently and forms a steel rod damper insertion hole 8 therein;
g. A steel rod damper 10 as a single rod-shaped damper inserted into the steel rod damper insertion tube 8;
It consists of each structure.
In the above, the steel rod damper insertion tube 9 and the steel rod damper 10 constitute a “damper mechanism”.

Hereinafter, the detailed structure of each part will be described.
Load receiving plate 1 (See Figs. 1 and 2)
The load receiving plate 1 is formed of a rigid flat plate having a predetermined thickness with a hard material (usually made of steel), and is fixed to the upper surface of the lower structure B while maintaining a level. The upper surface 1a of the load receiving plate 1 is a smooth surface and requires solidity (including airtightness and watertightness) in addition to rigidity in order to maintain various functions described later.

Load support cylinder 2 (see FIGS. 1 to 4)
The load supporting cylindrical body 2 is formed of a cylindrical rigid structure that is opened downward with a predetermined thickness and includes a cylindrical side wall portion 12 and a ceiling wall portion 13, and is integrated with the upper structure G to be integrated with the lower structure B. Transmit load to A true circular internal pressure chamber J to be pressurized is formed inside the load supporting cylinder 1. For this reason, in addition to the rigidity, the load supporting cylinder 1 is made of a material having solidity (airtightness, watertightness).
Specifically, the cylindrical side wall portion 12 has an enlarged-diameter wall portion 12a at the lower portion thereof, the lower end surface thereof is smoothed, and an annular groove 14 is provided facing the lower end surface. 14, the attachment holes 15 are formed at a plurality of locations (6 in the present embodiment) on the circumference from the upper surface of the enlarged wall portion 12 a. The ceiling surface 13a of the ceiling wall part 13 forms a smooth or normal level surface. As will be described later, a through hole for a predetermined member is opened in the ceiling wall portion 13, but the main body portion itself is kept solid.

Sealing member 3 (see FIGS. 2, 3 and 4)
The sealing member 3 is made of a rubber annular body having a circular cross section of the main body portion 3a, and mounting projections 3b project from the mounting holes 15 at a plurality of portions on the upper surface of the annular body. The mounting projection 3b is inserted into the mounting hole 15 in a crimping manner, and the main body 3a of the sealing member 3 is accommodated in the concave groove 14 of the cylindrical side wall 12 of the load supporting cylinder 2. The mounting projection 3b is inserted into the mounting hole 15 in a pressure-bonding manner, and prevents the main body 3a of the sealing member 3 from falling out of the concave groove 14.
The main body 2a of the sealing member 2 has a so-called O-ring function, and exerts a sealing action against pressurization of the internal pressure chamber J with a predetermined compression rate by contact with the upper surface 1a of the load receiving plate 1.
In addition, the load receiving plate 1 should just be a smooth surface at least in the site | part which contact | abuts this sealing member 3, and the other site | part does not need to be a special smooth surface. Similarly, the lower surface of the ceiling wall portion 13 of the load supporting cylinder 2 may not be a particularly smooth surface.
Further, in the present embodiment, a single sealing mode is adopted, but the concave grooves 14 are provided concentrically on the lower surface of the cylindrical side wall portion 12 of the load supporting cylindrical body 2, and a sealing member is provided in each concave groove 14. 3 is not excluded to take measures to increase the sealing action.

Supply pipe 4 and discharge pipe 5 (see FIGS. 1, 2 and 5)
The supply pipe 4 and the discharge pipe 5 are arranged in such a way that the outside and the internal pressure chamber J are communicated with each other at the possible corners of the ceiling wall portion 13 of the load supporting cylinder 2 while maintaining solidity (airtightness, watertightness). . That is, the filling fluid K is sent from the outside to the internal pressure chamber J through the supply pipe 4, and the filling fluid K in the internal pressure chamber J is discharged to the outside through the discharge pipe 5. In addition, the supply pipe 4 and the discharge pipe 5 may be an appropriate place on the cylindrical side wall portion 12 of the load supporting cylinder 2.
FIG. 5 shows a piping system connected to the supply pipe 4 and the discharge pipe 5, and the supply system piping 4 a is drawn to the outside and connected to the pressure pump 18 via the check valve 17. The discharge piping 5a is also drawn outside and connected to the on-off valve 19 (normally closed).
In this piping system, appropriate piping elements are further added depending on the state of the filling fluid K (gas, liquid). For example, when the filling fluid K is a liquid system, it goes without saying that a liquid tank is connected to the tip of the pumping pump 18.
(Filling fluid K)
The filling fluid K is appropriately selected from both gas and liquid modes (incompressible and small compressibility), but air and water are preferably used from the viewpoint of avoiding adverse effects on the environment.

(Pressure holding in internal pressure chamber J)
By sealing the internal pressure chamber J of the load supporting cylindrical body 2 by the contact of the load receiving plate 1 with the sealing member 3, the internal pressure chamber J of the load supporting cylindrical body 2 constitutes a sealed space, and the desired pressure is achieved. Holds. That is, the inside of the internal pressure chamber J receives a predetermined pressure by the filling fluid K fed into the internal pressure chamber J, and as a result, acts as an uplift force on the upper structure G and bears a considerable proportion of the load of the upper structure G. In the present embodiment, a load reduction of about 80% of the total load of the upper structure G is expected by all the internal pressure chambers J of the plurality of seismic isolation devices S installed in the present structural system.

Roller 7 (See FIGS. 1-3, 6 and 7)
The rolling element 7 is made of a rigid spheroid, and the upper and lower sides thereof are sandwiched between the load supporting cylinder 2 (its ceiling wall portion 13) and the load receiving plate 1, and the internal pressure chamber J of the load supporting cylinder 2 is fixed. There is a moving area in the horizontal direction inside. The spheroid is a three-dimensional shape obtained by rotating an elliptical plane including the center point O about the minor axis as a rotation axis. In this spheroid, as shown in FIG. 6, a (X direction), b (Y Direction) is the major axis, c (Z direction) is the minor axis, and a = b> c.
That is, in the case of a round sphere, the vertical distance between the upper and lower surfaces G and B between the upper and lower structures G and B, that is, the vertical distance between the contacts N and M, that is, the height takes a constant value. The surface curvature gradually changes, and a three-dimensional shape in which the height between the contact points on the upper and lower surfaces gradually increases as it rolls. Therefore, the height between the contact points on the upper and lower surfaces gradually decreases when rolling in the original position direction. As such a sphere, besides a spheroid, a paraboloid, a three-dimensional shape of catenary lines and clothoid lines is adopted.
In FIG. 6, the rolling element 7 forming a spheroid is in a fixed position at a point M from the lower surface (that is, the upper surface of the load receiving plate 1) 1 a and from the upper surface (that is, the lower surface of the ceiling wall portion 13) 13 a. The contact is made at the point N, and the height thereof takes the minimum value of h (= 2c). When the spheroid roller 7 rolls and tilts, the upper surface 13a is lifted, and the distance between the contact points N and M with the upper and lower surfaces gradually increases. At the same time, the reaction force is received from the upper and lower surfaces, and they act as couples having the same size and the opposite directions, and give the rolling element 7 a restoring force. In this figure, 7a is a cut plane obtained by cutting the side surface of the spheroid 7, and only the lower surface and the vicinity of the upper surface can be used.
FIG. 7 shows yet another sphere 7A. In this aspect, the upper surface and the lower surface have a radius of curvature R that is sufficiently larger than the distance r from the center O to form a partial sphere. In this embodiment, the surface curvature has a constant value, but exhibits the same dynamic characteristics as the spheroid rolling element 7, and the structure placed on the sphere 7A by taking a large R value. Can be prolonged.
As the rigid material of the present rolling element 7, an appropriate material such as iron (steel, cast iron), high-strength concrete, or hard synthetic resin can be adopted as a material that maintains a predetermined strength (compressive strength). In terms of form, high-strength concrete is preferably used because of its weight and cost. In high-strength concrete, the compressive strength is 60 N (Newton) / square mm, and sufficient rigidity is obtained.

(Arrangement of the rolling element 7)
The present rolling element 7 (outer diameter d = 2a, 2b) has its central axis aligned with the center of the inner pressure chamber J (inner diameter D) of the load supporting cylinder 1, and in the inner pressure chamber J in all horizontal directions. A movable space (Dd), that is, a moving area is provided. At this time, the rolling element 7 takes a fixed position and maintains a stable state.

Damper mechanism (see Figs. 1-3, 8)
The steel rod damper insertion tube 9 and the steel rod damper 10 constitute a “damper mechanism”. A steel rod damper insertion hole 8 is formed in the steel rod damper insertion tube 9, and the steel rod damper 10 moves while being guided by the steel rod damper insertion hole 8.

Steel rod damper insertion tube 9 (see FIGS. 1 to 3 and FIG. 8)
The steel rod damper insertion tube 9 has a steel rod damper insertion hole 8 therein, and is formed of a circular tubular body of a rigid material (generally made of iron) having a predetermined thickness. The rolling element 7, the load receiving plate 1, the load Each of them is arranged in a penetrating manner on the ceiling wall portion 13 of the support cylinder 2.
That is, the steel rod damper insertion tube 9 is disposed in the steel rod damper insertion tube 9 a disposed in the rotator 7, the steel rod damper insertion tube 9 b disposed in the load receiving plate 1, and the load support cylinder 2. The steel rod damper insertion tube 9c further includes a lid 9d at the upper end of the steel rod damper insertion tube 9c. 8a, 8b and 8c are steel rod damper insertion holes 8 of the steel rod damper insertion tubes 9a, 9b and 9c, respectively. These steel rod damper insertion tubes 9a, 9b, 9c are integrated when the rolling element 7 is in a fixed position, and transmit loads on the contact surfaces thereof.
More specifically, the steel rod damper insertion tube 9a disposed in the rolling element 7 is disposed in a constrained state in a hole formed along the central axis of the rolling element 7, and the upper and lower end surfaces thereof are flat. In addition, the upper and lower end surfaces of the rolling element 7 are flush with each other.
The bottomed steel rod damper insertion tube 9b disposed on the load receiving plate 1 has an upper end flush with the upper surface of the load receiving plate 1, that is, a flat surface. The steel rod damper insertion tube 9b extends downward from the lower surface of the load receiving plate 2, and a housing 22 projects from the outer surface of the steel rod damper insertion tube 9b. The load receiving plate 1 is firmly fixed to the load receiving plate 1 through welding).
The steel rod damper insertion tube 9c disposed in the load supporting cylinder 2 has a lower end flush with the lower surface of the ceiling wall portion 13 of the load supporting cylindrical body 1, that is, a flat surface, from the upper surface of the ceiling wall portion 13. It extends long upwards. The steel rod damper insertion tube 9b also has a housing 23 projecting from the outer surface thereof, and is firmly fixed to the ceiling wall portion 13 of the load supporting cylinder 1 through the housing 23 by a fixture. The upper end of the steel rod damper insertion tube 9c is opened, closed with a lid 9d, and used for the operation of inserting the steel rod damper 10.
Then, when the end faces of these steel rod damper insertion tubes 9a, 9b, 9c are brought into contact with each other in a fixed position state of the rolling element 7, it contributes to a suitable load transmission.
In addition, the steel rod damper insertion pipe 9a to the rotator 7 is abolished, the opening hole of the rotator 7 is used as a steel rod damper insertion hole 8a, and the upper and lower end surfaces of the rotator 7 are connected to the steel rod damper insertion pipes 9b, 9c It is not excluded to adopt a mode in which the upper and lower structures G and B are in contact with each other and transmit the load.

Steel bar damper 10 (See FIGS. 1 to 3 and FIG. 8)
The steel rod damper 10 is mainly composed of a steel rod having a predetermined elastic-plastic characteristic, and a steel rod damper insertion hole of a steel rod damper insertion tube 9 disposed on the rolling element 7, the load support cylinder 1, and the load receiving plate 5. 8 is inserted.
Thus, as the rolling element 7 rolls, the steel rod damper 10 is guided by the steel rod damper insertion hole 8 of the steel rod damper insertion tube 9 and deforms as it moves.
In addition, although the steel rod damper 10 employ | adopted the single rod-shaped body in this embodiment, use of the several small diameter steel wire is also included.

(Arrangement and installation of this seismic isolation device S)
The seismic isolation support device S is intended for a light or heavy structure building G such as a wooden structure, a steel structure, a reinforced concrete structure, etc., and is arranged as follows with respect to the building G as an upper structure.
FIG. 9 shows one aspect of the attachment / arrangement.
In the figure, B is a foundation as a substructure constructed by connecting to a foundation pile P placed on the ground E, and the upper surface of the foundation B is constructed at the same level surface. A plurality of the seismic isolation support devices S are arranged symmetrically on the foundation B (eight locations in the example), and the building body G is constructed on the base isolation support devices S. In a wooden lightweight building, the construction of the foundation pile P is not particularly necessary.
Thereby, the base isolation structure system in the structure by foundation B, base isolation support apparatus S, and building main body G is comprised.

Regarding the construction of the seismic isolation support device S, when constructing the cast-in-place concrete of the foundation B, there are a plurality of load receiving plates 1 in which steel rod damper insertion pipes 9b are attached to the upper surface Ba (FIG. 1) of the foundation B. The upper surface 1a is embedded and installed at the same level. The upper surface Ba of the foundation B is set to be equal to or lower than the upper surface 1a of the load receiving plate 1.
On each load receiving plate 1 on the foundation B, the load supporting cylinder 2 incorporating the sealing member 3, the rolling element 7, and the supply pipe 4 and the discharge pipe 5 is installed. At this time, the sealing member 3 abuts against the upper surface 1a of the load receiving plate 1 while maintaining a sealing action, and the steel rod damper insertion tube 9a of the rolling element 7 and the steel rod damper insertion tube 9c of the load supporting cylinder 2 are The steel rod damper insertion tube 9b of the load receiving plate 1 already installed is arranged on the same vertical line. Then, the steel rod damper 10 is inserted into the steel rod damper insertion tube 9 composed of the steel rod damper insertion tubes 9a, 9b, 9c, and is closed by the lid body 9d. In addition, a piping system (a supply system 4 a and a discharge system 5 a) is connected to the supply pipe 4 and the discharge pipe 5.
After each load supporting cylinder 2 is installed, the floor slab concrete of building G (a part of building G) is placed with a sufficient thickness from the upper surface of ceiling wall portion 13 of each load supporting cylinder 2. The Thereby, the load of the building G is loaded on the ceiling wall portion 13 of the load supporting cylinder 2.
The bottom surface Ga of the building G, that is, the bottom surface Ga of the floor slab concrete (see FIG. 1) is more than the upper surface 1a of the load receiving plate 1 on the condition that there is a gap from the upper surface Ba of the foundation B and the load support of the rolling element 7 is maintained. It is set to the height of. That is, when the upper surface Ba of the foundation B is lower than the upper surface 1a of the load receiving plate 1, the bottom surface Ga of the building G may coincide with the upper surface 1a of the load receiving plate 1, and the upper surface Ba of the foundation B is In the case of the same level as the upper surface 1 a of the plate 1, the bottom surface Ga of the building G is made higher than the upper surface 1 a of the load receiving plate 1.
In the illustrated example (FIGS. 1 and 2), the bottom surface Ga of the building G takes a slight gap from the top surface Ba of the foundation B, but the top surface position of the enlarged-diameter wall portion 12a of the load support cylinder 2 or the load support cylinder 2 It may be set to an appropriate position such as an upper surface position of the ceiling wall portion 13.
In the illustrated example, the seismic isolation support devices S are arranged at the same level. However, the present invention is not limited to this mode. The upper surface 1a and the lower end surface of the cylindrical side wall portion 12 of the load supporting cylindrical body 2 and the ceiling surface 13a of the ceiling wall portion 13 may be kept horizontal and parallel.

As mentioned above, the cast-in-place concrete construction of the foundation B and the superstructure G has been mainly described, but it is also possible to construct a precast version.
That is, a mode in which the floor slab portion of the superstructure G is precast and a plurality of (single or possible) precast floor slabs are fitted into the cylindrical side wall portion 12 of the load supporting cylindrical body 2 with holes formed in advance, or A mode in which the precast floor slab is placed and fixed on the ceiling wall portion 13 of the load supporting cylindrical body 2, and a mode in which the precast floor slab is placed and fixed on the upper surface of the enlarged diameter wall portion 12a of the load supporting cylindrical body 2. , Etc., and the floor slab part of the integrated superstructure G can be constructed by connecting the precast floor slabs to each other in each aspect.
According to this precasting, the distance from the upper surface Ba of the foundation B to the lower surface Ga of the upper structure G can be set freely, and there is no pouring of cast concrete into the lower surface of the load supporting cylindrical body 2, so that the construction is free. The degree increases.

  In order to fully perform the functions of the base isolation support device S and the base isolation structure system incorporating the base isolation support device S, it was derived from the supply pipe 4 and the discharge pipe 5 of the base isolation support device S. Predetermined operating devices (a check valve 17, a pressure pump 18, and an on-off valve 19) are connected to the piping system (supply system 4a, discharge system 5b).

FIG. 10 shows an aspect of the arrangement of the seismic isolation support device S on the artificial ground. In this aspect, an artificial ground G1 applied to a detached house, that is, a small-scale artificial ground is shown.
In the artificial ground G1 of this aspect, the foundation B is constructed directly on the ground E while keeping the horizontal, the load receiving plate 1 with the steel rod damper insertion tube 9b is arranged on the foundation B, and the rolling element 7 In addition, the artificial ground G1 is constructed with on-site concrete casting or a precast plate through the upper part of the seismic isolation support device S of the load support cylinder 2. In the upper part of the seismic isolation support device S, a sealing member 3, steel rod damper insertion tubes 9a and 9c, a lid 9d, a steel rod damper 10, a supply tube 4, a discharge tube 5 and their piping systems are provided. Of course. At this time, a thin interposed mat is laid on the foundation B and functions as a formwork material for concrete casting, and the upper part of the seismic isolation device S is buried. After the construction of the artificial ground G1, the residential building G2 is constructed directly on the manhole ground G1.
Thereby, the base isolation structure system in the structure by foundation B, base isolation support apparatus S, artificial ground G1, and building main body G2 is comprised. In this aspect, the artificial ground G1 constitutes the original superstructure G.

(Operation of the seismic isolation support device S)
The seismic isolation support device S is interposed between a building (or artificial ground), that is, an upper structure G, and a concrete foundation, that is, a lower structure B. 2 receives the lifting force (always) from the internal pressure chamber J in 2 and supports the load of the upper structure G, transmits the load to the lower structure B and thus the ground E, and exhibits seismic isolation against earthquake motion.

(A) Always A predetermined operating device, that is, a check valve 17 and a pressure pump 18 are connected to a piping system derived from the seismic isolation support device S, that is, a supply system piping 4a, and a discharge piping. An open / close valve 19 is connected to 5b. The filling fluid K pumped from the pump 18 is guided to the internal pressure chamber J, and when the internal pressure chamber J is filled with a predetermined pressure, the on-off valve 19 is closed. The filling fluid K in the internal pressure chamber J does not leak to the outside by the sealing member 3. In the present embodiment, air is used as the filling fluid K.
Thus, the load of the upper structure G is transmitted and supported by the lower structure B through the load support cylinder 2, the rolling element 7, and the load receiving plate 1 in the seismic isolation support device S. That is, the rolling element 7 maintains a fixed position state, and in this fixed position state, the steel rod damper insertion pipes 9a, 9b, 9c are in contact with each other in a planar shape to transfer the load, The load is smoothly transmitted to the lower structure B. On the other hand, an upward force (that is, an uplift force) acts on the upper structure G due to the pressure of the filling fluid K in the internal pressure chamber J, whereby the load on the upper structure G is reduced.
As a result, the support load shared by the rolling element 7 (and its steel rod damper insertion tube 9a) is greatly reduced. In this embodiment, a reduction of 80% is expected, and in this load state, the building G is not affected by a lateral load such as a wind load. Therefore, the installation pressure in this embodiment is as extremely small as 0.2 × (load of the upper structure G) (per unit area).
Furthermore, in the above-described state, the upper and lower support surfaces of the rolling element 7 in the fixed position are in contact with the surfaces 13a and 5a evenly in a flat shape, there is no stress concentration, and the long-term load can be dealt with. Yes, as a result, it takes a stable state and there is no paralysis. Further, even if there is no uplift force of the internal pressure chamber J and only the rolling element 7 is used, its loading capacity is sufficient due to the rigidity of the rolling element 7.
Note that the steel rod damper 10 disposed at the center of the rolling element 7 and thus at the center of the seismic isolation support device S is in an unloaded state, and does not particularly affect the stationary structure.

(B) During an earthquake (see Figs. 11 and 12)
During an earthquake (and including all cases where a force that causes shaking such as excessive wind load acts on the structure), the ground E shakes greatly, and the foundation B as the substructure is subjected to the forced displacement of this earthquake motion. Vibrates integrally with the ground E, but the upper structure G is oscillated through the rolling action of the rolling element 7 which forms the main body of the seismic isolation support device S, and the upper structure G and the lower structure B are Relative displacement occurs.
The rolling element 7 in contact with the upper structure G rolls along with the movement of the upper structure G, and the upper structure G supported by the rolling element 7 follows the rolling locus of the rolling element 7. To do. When the superstructure G moves in the reverse direction, the above operation is reversed.
Accompanying the earthquake motion, the superstructure G follows the rolling trajectory of the rolling element 7 and swings along with the vertical movement, so that the structure G has a swinging action with a large period due to the rolling action of the rolling element 7. Therefore, it is possible to avoid adverse effects such as resonance effect due to the strong ground motion of short period components.

(B-1)
If there is an initial motion of a large earthquake motion above a certain level, this building, that is, the upper structure G, has a small vertical load on the surface due to the effect of the lifting force at all times. The rolling action is immediately demonstrated. In other words, the lifting force triggers the rolling movement of the rolling element 7 and smoothly shifts to the following (B-2) and subsequent states. If the upward movement accompanying the rolling of the rolling element 7 breaks the sealing action of the sealing member 3, the effect of this lifting force is lost.

(B-2)
Subsequently, when the upper structure G moves rightward (b) in FIG. 11, the rolling element 7 receives a lateral forcing force (so-called seismic inertial force) from the contact (support point) N on the upper surface. A rotational force is generated, and rotation in the right direction, that is, in the clockwise direction, starts from the contact (support point) M on the lower surface. At this time, the engagement action between the damper steel bar 10 and the upper part of the rolling element 7 also serves as a trigger for rotation.
Due to the rotation, that is, the tilting movement of the rolling element 7, the lower contact M shifts to the right without causing a slip, and at the same time, the upper contact N shifts to the left without causing a slip. The vertical distance from the lower surface, that is, the height of the upper contact increases, and the upper structure G is lifted upward. With this lifting, the filling fluid K in the internal pressure chamber J is dissipated, the uplifting action by the internal pressure chamber J is lost, and the rolling element 7 loads the entire load W of the building. Has a sufficient bearing strength. It should be noted that the couple due to the acting force of the building load W on the support point N and the reaction force from the support point M acts in the direction opposite to the rotation direction of the rolling element 7 and increases with the rotation of the rolling element 7. Although it acts as a restoring force in the clockwise direction, the influence is small at the initial stage of rotation.
At the same time, the steel rod damper 10 is pulled out from the steel rod damper insertion tube 9b of the load receiving plate 1 and the steel rod damper insertion tube 9c of the load supporting cylinder 2 and is bent to exert a damper action.
When the rolling movement of the rolling element 7 proceeds and comes to the right end, the upper contact N is at the highest position. FIG. 11 shows this state.

(B-3)
When the superstructure G receives a seismic inertia force in the reverse direction and moves to the left (in the direction B in FIG. 12), the above state is reversed.
First, the rolling element 7 starts to rotate in the left direction, that is, counterclockwise from the right end position, but the couple action (or rotational moment) due to the building load acting on the rolling element 7 contributes to this rotation, and the restoring force. Acts as As the rolling element 7 rotates, the lower contact M shifts to the left and the upper contact N also shifts to the right. As the building G moves downward, the two contacts M and N approach the initial position. The steel rod damper 10 is drawn into the steel rod damper insertion tube 9c of the load supporting cylinder 2 and the steel rod damper insertion tube 9b of the load receiving plate 1 and is deformed linearly to exhibit a damper action.
The lower contact M and the upper contact N simultaneously become the initial position, and the rolling element 7 passes through the lowest position (neutral position).
Further, the superstructure G moves to the left in response to the seismic inertia force, and the lower contact M and the upper contact N are shifted to the left and to the right, respectively, and the vertical distance (height) is increased. That is, it conforms to the state (B-2) described above. The steel bar damper 10 is also bent again and exhibits a damper action. The couple effect due to the building load gradually increases, generating a restoring force and counteracts this left displacement.
When the rolling movement of the rolling element 7 proceeds and reaches the left end, the upper contact N is at the highest position. FIG. 12 shows this state.

(B-4)
Along with the earthquake motion, the superstructure G oscillates, and the rotator 7 responds to this oscillation (B-2)
Repeat (B-3).
As a result, the structure has a long period with the rolling action of the rolling elements 7, the harmful resonance phenomenon is avoided, and the desired seismic isolation action is obtained. In this operation, the rolling element 7 exhibits a characteristic that a restoring force is generated by a couple action acting on the upper and lower fulcrums, and a stable state is restored.
On the other hand, the steel rod damper 10 in the seismic isolation device is also constantly deformed, exhibits a damping effect due to the deformation energy, and quickly reduces the vibration of the structure G.

(B-5)
When the earthquake motion ends and the upper structure G returns to the original position, the inner pressure chamber J is filled with the filling fluid K again. As a result, the seismic isolation system returns to its function in the fixed position and prepares for the next earthquake motion.

(C)
The swinging action and the returning action at the time of the vibration are not limited to the seismic motion, and are applied to all the vibrations between the structures in which the seismic isolation support device S is installed.

(Effect of the seismic isolation support device S)
According to the seismic isolation support device S of the present embodiment, while having an uplift function at all times by pressurization to the internal pressure chamber J, while exhibiting the load support action at all times and during an earthquake by the rolling elements 7, The long-term rolling movement (vibration) of the rolling element 7 accompanying the relative movement between the upper structure G and the lower structure B in FIG. Correspondingly, the rod-shaped damper 10 is bent and deformed to exert a damping force, and the return force is exerted by the couple action due to the eccentricity of the upper contact N and the lower contact M of the rolling element 7, thereby providing multi-functionality. It has an efficient seismic isolation support device with built-in uplift function.
Due to the uplifting action at all times, the load of the rolling element 7 is reduced, the rolling element 7 has long-term sustainability, and the initial motion of the base isolation is smoothly performed during an earthquake, and there is no impact action on the superstructure G. In addition, the steel rod damper insertion tubes 9a, 9b, and 9c are integrated when the rolling elements 7 are in a fixed position, and the load is transmitted at their contact surfaces, and the rigidity is high and the load resistance is high. .
And in this seismic isolation support apparatus S, it can cope with all the directions of a horizontal surface by making the rolling element 7 hold | maintain a predetermined movement space.
Thus, in the seismic isolation structure system including the seismic isolation support device S, the structure G on the rolling element 7 is stably supported at all times, and the natural period of the structural system during the earthquake is increased. The damper function provided in the rolling element 7 and the restoring force due to the couple action of the specific shape of the rolling element 7 are exhibited, and an excellent seismic isolation effect can be obtained, and the structure system can be vibrated quickly. Attenuation is realized. In addition, the load of the superstructure G is reduced by the uplift action at all times, the long-term sustainability of the device S of this seismic isolation system is ensured, and the initial motion during the earthquake is made smooth, so that the superstructure G There is no impact on the upper structure G, and there is no adverse effect on the superstructure G.

The present invention is not limited to the above-described embodiment, and various design changes can be made within the scope of the basic technical idea of the present invention. That is, the following aspects are included in the technical scope of the present invention.
1) In the damper mechanism of the present embodiment, a mode in which a single rod-shaped damper (steel rod damper) and upper and lower rod-shaped damper insertion pipes through which the rod-shaped damper is inserted is shown, one end is fixed to each of the upper and lower structure. The aspect which consists of two rod-shaped dampers can be taken.
FIG. 13 shows a damper mechanism of one aspect thereof, and the same reference numerals are given to members equivalent to those of the previous embodiment. The damper mechanism is composed of two steel bar dampers 30 and 31 as upper and lower independent bar dampers. The lower damper bar 30 has a threaded portion 30a at one end and the other end from below the load receiving plate 1. It is inserted into the steel rod damper insertion hole 8a of the rolling element 7 through the steel rod damper insertion hole 8b of the load receiving plate 1, and the packing 32 is held and fixed to the lower end of the load receiving plate 1 at one end side ( In the illustrated example, welding is employed.) The fixing body 33 is screwed into the screw hole and fixed. The upper damper rod 30 also has a threaded portion 31 a at one end, and the other end rolls from above the ceiling wall portion 13 of the load supporting cylindrical body 2 through the steel rod damper insertion hole 8 c of the load supporting cylindrical body 2. It is inserted into the steel rod damper insertion hole 8a of the child 7 and is fixed by screwing into a screw hole of a fixing body 35 which is fixed by holding the packing 34 at the upper end of the load supporting cylinder 2 at one end side. .
In this embodiment, as the rolling element 7 rolls, the steel rod dampers 30 and 31 are bent and deformed to absorb the energy of the earthquake motion.
2) Although the seismic isolation mode in all directions is shown in the present embodiment, the seismic isolation mode in one direction (for example, the X direction) is not excluded. In this case, an ellipse is taken in the XZ plane, and the same elliptical cross-sectional shape is taken in the Y direction. Furthermore, by providing a restraining means at the end in the Y direction, displacement only in the X and Z directions is allowed.

  DESCRIPTION OF SYMBOLS S ... Rolling seismic isolation support device G ... Upper structure, B ... Lower structure, 1 ... Load receiving plate, 1a ... Upper surface, 2 ... Load support cylinder, 3 ... Sealing member, 4 ... Supply pipe, 5 ... Discharge pipe, DESCRIPTION OF SYMBOLS 7 ... Roller, 8 ... Rod-shaped damper insertion hole, 9 ... Rod-shaped damper insertion tube, 10 ... Rod-shaped damper, 12 ... Cylindrical side wall part of the load support cylinder 2, 13 ... Ceiling wall part of the load support cylinder 2, 13a ... Lower surface, J ... Internal pressure chamber, K ... Filling fluid, M ... Lower contact, N ... Upper contact

Claims (4)

It is interposed between an upper structure and a lower structure that can move relative to each other in the horizontal direction, transmits the load of the upper structure to the lower structure, and allows the relative movement between the upper structure and the lower structure. A seismic support device,
a. A rigid load receiving plate whose upper surface forms a level surface is fixed to the upper surface of the lower structure,
b. On the lower surface of the upper structure, a rigid load supporting cylinder made of a cylindrical body having a cylindrical internal pressure chamber opened downward is fixed,
c. A sealing member that seals between a facing portion with a smooth surface formed on the upper surface of the load receiving plate is fixedly held at the lower end of the cylindrical side wall portion of the load supporting cylinder,
d. In the internal pressure chamber of the load supporting cylinder, a rolling element made of a rigid body and having a spheroid shape whose surface curvature gradually changes has a moving area in the horizontal direction, and above and below the ceiling wall of the load supporting cylinder. Sandwiched between the lower surface of the portion and the upper surface of the load receiving plate, and arranged to support the load of the upper structure,
e. A filling fluid is sealed in a pressurized state in the internal pressure chamber in a fixed position state,
f. A rod-shaped damper insertion hole is formed along the central axis of the rolling element, and the rod-shaped damper insertion hole of the rolling element is in a fixed position on the load receiving plate and the ceiling wall portion of the load supporting cylinder. The rod-shaped damper insertion pipes having the rod-shaped damper insertion holes on the same straight line are arranged so as to maintain hermeticity. Become,
A seismic isolation support device. In place of the f-term of claim 1, a rod-shaped damper insertion hole is opened along the center axis of the rolling element, and one end is fixed to the upper and lower part structure while maintaining the solidity, and the other end is the rod-like shape. A rod-shaped damper is inserted into the damper insertion hole.
A seismic isolation support device. A plurality of components that are interposed between an upper structure and a lower structure that can move relative to each other in a horizontal direction, transmit a load of the upper structure to the lower structure, and allow a relative movement between the upper structure and the lower structure. A seismic isolation system comprising a seismic isolation support device of
The seismic isolation support device is
a. A rigid load receiving plate whose upper surface forms a level surface is fixed to the upper surface of the lower structure,
b. On the lower surface of the upper structure, a rigid load supporting cylinder made of a cylindrical body having a cylindrical internal pressure chamber opened downward is fixed,
c. A sealing member that seals between a facing portion with a smooth surface formed on the upper surface of the load receiving plate is fixedly held at the lower end of the cylindrical side wall portion of the load supporting cylinder,
d. In the internal pressure chamber of the load supporting cylinder, a rolling element made of a rigid body and having a spheroid shape whose surface curvature gradually changes has a moving area in the horizontal direction, and above and below the ceiling wall of the load supporting cylinder. Sandwiched between the lower surface of the portion and the upper surface of the load receiving plate, and arranged to support the load of the upper structure,
e. A filling fluid is sealed in a pressurized state in the internal pressure chamber in a fixed position state,
f. A rod-shaped damper insertion hole is formed along the central axis of the rolling element, and the rod-shaped damper insertion hole of the rolling element is in a fixed position on the load receiving plate and the ceiling wall portion of the load supporting cylinder. The rod-shaped damper insertion pipes having the rod-shaped damper insertion holes on the same straight line are arranged so as to maintain hermeticity. Become,
This is a seismic isolation system. It replaces with the f term of Claim 3, and while a rod-shaped damper penetration hole is opened along the center axis | shaft of a rolling element, one end is fixed to a top-and-bottom part structure, respectively, and the other end is said rod-shaped A rod-shaped damper is inserted into the damper insertion hole.
This is a seismic isolation system.

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