WO2004005749A1

WO2004005749A1 - Foundation with damping fuction

Info

Publication number: WO2004005749A1
Application number: PCT/JP2003/008513
Authority: WO
Inventors: Eisaku Hino
Original assignee: Eisaku Hino
Priority date: 2002-07-05
Filing date: 2003-07-04
Publication date: 2004-01-15
Also published as: AU2003281308A1

Abstract

A damping foundation (S), comprising a base stand part (1) interlocked with a lower structure (B) and a movable stand part (2) interlocked with an upper structure (G), the base stand part (1) further comprising a rigid base stand (6) having a sliding surface on the upper surface thereof, columnar members (7) vertically installed on the base stand (6), and a restrained beam (8) installed across the upper parts of the columnar members (7), the movable stand part (2) further comprising restrained holes (18) for accepting the columnar members (7) formed above the upper surface of the base stand (6) with moving clearances (α) provided in a sliding direction so that the upper surface of a movable stand (9) can be uniformly press-restrained by the contact thereof with the restrained beam (8) to allow a movement only in the sliding direction, wherein a return mechanism formed of spring materials (22) is installed between the columnar members (7) and the movable stand (9), whereby when an earthquake motion acts on the damping foundation (S), the damping foundation (S) can cope with the movement on a horizontal plane in all directions, and can rapidly damp the earthquake motion.

Description

Meishinda basic technical field with damping function

This invention is interposed between an upper structure such as a structure, machine or floor structure and a lower structure such as a foundation or floor to support the load of the upper structure and to prevent an upper portion against forced vibration such as earthquake motion. Attenuating foundations to reduce structural sway.

The invention further relates to an attenuating foundation suitable to be applied to low rise buildings or homes. Background art

As a damping foundation for buildings, currently generally, a laminated rubber body consisting of alternately laminated rubber plates and steel thin plates is mainly used, and a laminated rubber bearing in which a lead plug is enclosed in the laminated rubber body is adopted as appropriate. Although this has an advantage of exhibiting a relatively large loading capacity and having an elastic return action, since it undergoes shear deformation integrally following the displacement of the upper structure, the bearing area changes. Inevitability is inevitable. Also, because it depends on rubber elasticity, it is not possible to obtain a sensitive response to earthquake motion.

On the other hand, damped bearings (hereinafter referred to as "sliding bearings") with sliding or rolling functions provide sensitive response to earthquake motions, have relatively small changes in the supporting area, and have stable loading capacity. On the other hand, there is a disadvantage that the sensitivity with movement causes instability in the structure and is susceptible to the overturn moment of the superstructure.

SUMMARY OF THE INVENTION In view of the advantages of this sliding bearing, the present invention aims to provide a damping foundation with a sliding function of a novel structure which overcomes the disadvantages of the structural instability.

Therefore, the present invention enables the movable system interlocking with the upper structure to slide horizontally movably within a certain range with respect to the base system interlocking with the lower structure, and the movable beam is generated by the restraint beam arranged in the base system. This problem was solved with the basic idea of restricting the Disclosure of the invention

The damping foundation of the present invention comprises a base system linked to a foundation or a lower structure such as the ground, and a movable base system installed on the base system to allow horizontal movement, and the building, machine or floor A base having a damping function in which an upper structure such as a structure is mounted and fixed to the movable base system, the base system comprising: a base of a rigid body having a sliding surface on the upper surface; It comprises: a plurality of column members which are erected and a constraint beam which is bridged between the column members at the upper part of the column members with rigidity maintained, and the movable base system is a sliding surface on the upper surface of the base. A movable base of rigid body is mounted on the movable base through a gap, a restriction hole is opened in the movable base for receiving the column member with a movement gap in the sliding direction, and the movable base of the movable base Only the movement in the sliding direction is permitted and restrained by the abutment with the restraining beam. Return mechanism consisting mainly of root material if between the Kibashira member and the movable table as a basic structure that is formed by interposed.

The specific constitution of the present invention is shown in the following "Best Mode for Carrying Out the Invention". The present invention can take the following aspects in addition to this basic configuration.

(1) The restraining beam is disposed with a movement gap in a restraining groove formed in the movable table,

(2) The movable base is composed of a combination of precast concrete plates,

3 Pre-compression force is introduced to the spring material of its return mechanism,

4) A buffer mechanism is interposed between the column member and the movable base,

(5) A lock mechanism is interposed between the restraint beam and the movable base,

(6) A support is installed on the movable support via a plurality of legs, and the upper structure is joined via the support;

7 Attached to 6 above, the support is elastically supported,

To replace the sliding movement of the 8 damping foundation with rolling movement,

9) In the above item 8, the rolling and moving means is composed of a plurality of steel balls and is interposed between the base and the movable base,

Are optional matters that are adopted as appropriate.

(Action) '

At all times, the load of the upper structure is transmitted to and supported by the lower structure via the movable base and base. The support surface of the damping foundation is a sliding surface, which has a broad support surface, and It consists of a rigid body and has a large loading capacity. At all times, even if wind load is applied to the superstructure, the pre-compression force prevents movement when pre-compression is introduced to the return mechanism.

When a forced vibration force such as an earthquake acts, the foundation is disconnected at the top and bottom surfaces of the base and the movable base, and earthquake motion occurring in the lower structure and base is hardly transmitted to the upper structure. . During this time, the relative displacement between the upper structure and the lower structure allows the load of the upper structure to be absorbed by the predetermined clearance between the column member and the restraining hole while being supported by the base over a wide area via the movable table. . Also, although this relative displacement occurs in all directions in the horizontal plane, this foundation allows this horizontal displacement and does not constrain it.

And it is made to return promptly to the 0 point (initial) position by the return mechanism arranged in each pillar member.

Furthermore, at this displacement, the upper surface of the movable table linked to the upper structure is abutted and restrained by the restraining beam to seal the upper lift of the movable table and to prevent the overturning moment generated in the upper structure. Brief description of the drawings

FIG. 1 is a partial side vertical cross-sectional view showing a whole configuration of an embodiment (first embodiment) of a damping foundation of the present invention (a side view taken along a line 11-a cross-sectional view of FIG. 2).

Fig. 2 is a partial plan view and a partial horizontal cross-sectional view of Fig. 2 (2-line plane · cross-sectional view of Fig. 1).

3 is a cross-sectional view taken along line 3-3 in FIG.

Fig. 4 is a schematic diagram of the lock mechanism.

FIG. 5 is an illustration of the installation and placement of the damping foundation.

FIG. 6 is a partial side vertical cross-sectional view showing the entire configuration of another embodiment (the second embodiment) of the damping foundation of the present invention (the side view along line 11 in FIG. 7 · cross-sectional view).

Fig. 7 is a plan view thereof (a view on arrow 7-7 in Fig. 6).

8 is a sectional view taken along line 8-8 of FIG.

FIG. 9 is a plan view showing another aspect of this embodiment. BEST MODE FOR CARRYING OUT THE INVENTION

Embodiments of the damping foundation of the present invention will be described based on the drawings.

First Embodiment

1 to 4 show attenuating foundation S of one embodiment of the present invention, and show an example of application to a mid-story. As shown in FIGS. 1 to 3, the damping foundation S is a base system 1 interlocked with the foundation B or the lower structure B of the ground and a predetermined horizontal movement of the base system 1 to allow restraint. A movable base system 2 and a support base system 3 mounted on and fixed to the movable base system 2 and interlocked with the upper structure G, the return being interposed between the base base system 1 and the movable base system 2 The mechanism 4 and the buffer mechanism 5 are included.

More specifically, the base system 1 has a substantially rectangular plate-like base 6 whose upper surface has a smooth surface, four pillar members 7 erected on the base 6, and the pillar members 7. And a restraining beam 8 bridged over the column members 7 while maintaining rigidity. Movable system 2 mainly comprises movable table 9 slidably mounted on the upper surface of base 1, and has column members and restraint beam 8 with holes and grooves formed in movable table 9. Allow and accept movement. The support system 3 mainly has a rectangular flat plate-like support 10, and is mounted and fixed on a movable stand 9 via a plurality of legs 11. The lower anchor 12 is fixed to the base 6 and the upper anchor 13 is fixed to the support 10, and interlocked with the upper structure G and the lower structure B.

The following describes the structure of each part in detail.

(Base system 1)

The base 6 is formed of a rigid material made of steel or concrete, and the upper surface 6 a is a smooth surface to form a square plate (square or rectangle) having a predetermined thickness.

The column members 7 are formed of a rigid material made of steel or concrete, have a cylindrical shape of a predetermined length, and are erected at four locations on the upper surface of the base 6. The four column members 7 are arranged at square corners. When the column member 7 is made of metal (for example, steel), it is welded and fixed directly to the base 6 or a screw 7 a is screwed on its base and drilled on the base 6. Screwed into screw hole 6 b. The former is shown in the left part of FIG. 3 and the latter is shown in the right part of FIG. 3 c Retaining beam 8 is made of a rigid body and is rigidly connected between the column members 7 at the top of the column members 7 It is bridged keeping the standard. The connection of the restraining beam 8 to the column member 7 is fixed via a joint 15 fitted onto the top of the column member 7. Fitting 15 consists of a steel cylinder, The height thereof is substantially equal to the height of the restraining beam 8 and tightly fitted to and fixed to the head of the cylindrical column member 7.

It should be noted about the above-mentioned base system 1 that the base 6 · pillar member 7 · restraint beam 8 constituting the base system 1 is integrally formed with rigidity and functions integrally.

(Movable system 2)

The movable stand 9 is formed of a rigid material made of steel or concrete and has the same shape in plan view as the base 6 and has the same height as the column member 7. The lower surface 9 a of the movable table 9 is a smooth surface, and is mounted on the upper surface 6 a of the base 6 in a slidable manner. As a result, the movable base 9 and the base 6 contact with each other in a large area, so that a large load can be supported.

A circular restraint hole 18 is opened in the movable stand 9 at the corresponding position of the column member 7 vertically. The diameter of the restraining hole 18 is sufficiently larger than the diameter of the column member 7, and the clearance thereof gives the allowable movement of the movable table 9, but the return mechanism 4 and the buffer mechanism which will be described later are substantially described. Because 5 is interposed, the amount of movement is smaller than α.

Constraint hole 18 consists of an upper part 18 Α and a lower part 18 下方, and the lower part 18 拡 is larger in diameter than the upper part 18 、 and has an expanded diameter. The lower part 18 B is equipped with a spring material and an elastic ring described later.

In the movable table 9, a restraining groove 20 is further formed in the upper surface of the movable table 9 in communication with the restraining hole 18. The restraining grooves 20 each have a predetermined depth and width and receive the restraining beam 8. The depth of the restraining groove 20 is the same height as the height of the restraining beam 8, and the bottom surface of the restraining groove 20 slidably abuts on the lower surface of the restraining beam 8. The width of the restraining groove 20 is sufficiently larger than the width of the restraining beam 8 and the free space 13 thereof is substantially equal to the free space described above. As a result, the movable stand system 2 can move by a width twice that of the clearance / 3.

(Return mechanism 4, shock absorber 5)

The return mechanism 4 and the buffer mechanism 5 are interposed between the column member 7 of the fixed base system 1 and the restraint hole 18 of the movable base system 2.

The return mechanism 4 has a plurality of coil springs 22 fixed at both ends at an intermediate position between the column member 7 and the restraint hole 18 and arranged radially (in the present embodiment, at 45 ° intervals) with a predetermined interval maintained. The Be The spring coefficient of this coil spring 22 is adjusted appropriately and does not restrict the allowable movement amount of the movable base 9.

The coil springs 22 are radially arranged uniformly (in the present embodiment, 45 °), and adopt one mode in which 1 pre-compression force is introduced and 2 mode in which stress is 0.

In the embodiment in which the compression force of 1 is introduced, the movable base system 2 receives a reaction force from the column member 7 through the coil spring 22 and the movable base system 2 until an external force having a magnitude corresponding to the compression force is applied. Remains stationary. In the mode in which the stress of 2 is 0, the stationary state is maintained until a predetermined external force by cooperating with the lock mechanism described later, but when the seismic force is detected, the lock mechanism is released, and the coil spring 2 Compression and tension are alternately introduced.

The coil spring 22 of the return mechanism 4 has not only a return function but also a damping function, but when a particularly large damping force is required, an even greater compressive force is introduced to the coil spring 22.

The buffer mechanism 5 is mounted around the column member 7 so that the annular rubber ring 25 faces the lower expanded diameter portion 18 B of the restraining hole 18 at the lower part of the column member 7. The rubber ring 25 has sufficient strength and elasticity, and may be hollow or solid, and its cross section may be circular or square. Fixing of the rubber ring 25 to the column member 7 is made rigid so that the rubber ring 25 does not easily come off when it strikes against the hole wall of the restraint hole 18.

(Lock mechanism 2 8)

Further, a lock mechanism 28 is interposed between the movable base 9 and the restraining beam 8 facing the restraining groove 20 between the fixed base system 1 and the movable base system 2.

The lock mechanism 28 has an inlet / outlet 29 recessed in the movable base 9, a lock pin 30 disposed in / out of the inlet / outlet 29, and a fluid (air) communicated with the inlet / outlet 29. · Oil) Consists of three passages. The lock pin 30 is housed in the inlet / outlet 29 in an airtight / liquid-tight manner so as to be able to enter or leave, and is restrained by the compressed working fluid (air, oil) supplied from the fluid passage 31 behind the inlet / outlet 29. It is pushed towards the beam 8.

Thus, the lock mechanism 28 is led to the external lock control mechanism 33 via the fluid passage 31.

One configuration example of this control mechanism 33 is shown in FIG. In the figure, reference numeral 34 denotes an electromagnetic drive type three-way valve, and in response to the drive signal, the valve body 34 is rotated to conduct and open the working fluid. First, the wind pressure system (3 3 A) consists of a wind pressure detector 35, an air compressor or hydraulic motor 36 and this three-way valve 34. When there is a wind speed above a predetermined level, the wind pressure detector 35 The air compressor · hydraulic motor 3 6 is detected, and the three-way valve 3 4 is turned on, and working fluid is sent to the port mechanism 2 8 through the fluid passage 3 1. The earthquake system (3 3 B) consists of an earthquake detector 3 7 and the three-way valve 34. When an earthquake occurs, the earthquake detector 3 7 detects this earthquake and opens the three-way valve 34, Lock mechanism 2 Unlock the lock.

(Support system 3)

The support base 10 is in the form of a rectangular flat plate having a predetermined thickness, is formed of a rigid material, and is mounted on and fixed to the movable base 9 via the plurality of legs 11.

The legs 1 1 have a rigid short cylindrical shape and are fixed as evenly as possible on the movable base 9 and uniformly transmit the upper load G placed on the support 10 to the movable base 9 . In the present embodiment, although the leg 11 is a rigid body, the support mechanism 10 can be elastically supported by a spring mechanism interposed in the lower part of the leg 11 or by a spring member (compression coil spring) in an artificial manner. .

(Installation and placement of this seismic isolation foundation S)

The seismic isolation foundation S is arranged and attached to the medium-scale reinforced concrete or steel frame structure G as follows.

Figure 5 shows its installation and arrangement. An appropriate foundation pile P is placed on the ground E, and the head of the foundation pile P is rigidly connected with a concrete foundation B. At the same time as placing this concrete foundation B, the base 6 of the reducing foundation S will be installed with the lower anchor 12 at the same level. After that, assemble the damping foundation S on the foundation 6.

Attenuating foundations S are evenly distributed on the foundation B with symmetry. Although four locations are minimized, in mid-scale structures, many more damping foundations S are placed. In the damping base S, the supporting capacity per unit is high, so it may be relatively small. Although not shown in FIG. 5, in some cases, the damping device D may be disposed side by side with these seismic isolation foundations S or independently.

The building G is mounted on the attenuating foundation S via an upper anchor 13 fixed to a support 10. Built. When the frame structure of the structure G is steel, the upper anchor 13 is unnecessary and is directly welded to the support 10.

(Effect of the damping base S)

(A) Always

At all times, the load of the upper structure G is transmitted to and supported by the lower structure B via the support base 10, the movable base 9 and the base 6. The supporting surface of the damping foundation S is a sliding surface 6 a (9 a), which has a wide supporting surface and is made of a rigid body, and has a large loading capacity.

When a strong wind acts in this state, preload pressure is introduced to the coil spring 22 of the return mechanism 4, so it resists the wind load within this preload range and holds the static state.

In addition, when the lock mechanism 28 is in operation, the lock pin 30 is pressed against the restraining beam 8 and the movable base 9 remains immobile to counter the wind load.

(B) Earthquake

When the ground E receives a forced vibrational force during an earthquake, the concrete foundation B vibrates integrally, but the horizontal force generated in the superstructure G is larger than the biasing force of the coil spring 22 and thus overcomes the biasing force. And, sliding occurs on the sliding surfaces 6a and 9a between the base 6 and the movable base 9. In other words, relative displacement occurs between the upper structure G and the lower structure B, and the horizontal movement of the earthquake motion occurs. The force is reduced and input.

The input horizontal force generates a rocking force F on the upper structure G, and the upper structure G sways in its natural cycle, but the coil spring 22 of the return mechanism 4 quickly moves to the 0 point (initial) position It is returned. At this time, since the coil springs 22 are equally distributed radially, the compressive force and the tensile force act equally, and both coil springs 22 exert an effect of returning to the initial position. The relative displacement between the upper structure G and the lower structure B is as follows: The load of the upper structure G is supported by the base 6 over a wide area through the movable platform 9, and between the column member 7 and the restraining hole 18 and It is absorbed at a given clearance α, 0 between the beam 8 and the restraining groove 20.

Also, relative displacement between the upper structure G and the lower structure 生じる occurs in all directions in the horizontal plane, but the clearance around the column member 7 and the restraining beam 8 allows this displacement and does not restrain it.

Also, the displacement difference between the upper structure G and the lower structure 生じる caused by the slip is close to the allowance. When this occurs, the rubber ring 25 of the shock absorbing mechanism 5 comes into contact with the lower restraint hole 18 B, but is absorbed by the elasticity of the rubber ring 25. In this displacement, the movable table 9 interlocked with the upper structure G is press-restrained on its upper surface by the constraining beam 8 evenly by the four sides, sealing the upper lift of the movable table 9 and preventing the overturning moment generated in the upper structure G .

(B-1) Strong wind at the time of earthquake

In the case of strong winds, in the case of a damping foundation S having a locking mechanism 28, the locking mechanism 28 is operating, but when earthquake motion occurs in this state, an earthquake signal is detected from the earthquake detector 37. With this signal, the fluid passage for sending the working fluid to the lock mechanism 2 8 is opened, and the lock mechanism 2 8 is quickly released.

Since the forced vibrational force caused by the earthquake is superior to the wind load, it exerts the function of the damping foundation S described above by the seismic force.

(Effect of the damping base S)

According to the damping foundation S, the displacement of the earthquake motion can be dealt with in all directions in the horizontal plane by maintaining a predetermined moving space in the damping foundation S.

It should be particularly noted that in the damping foundation S, the movable base 9 linked to the upper structure G is pressed and restrained equally by the constraining beams 8 (four sides) even in the displacement of the earthquake motion, and the movable base 9 The upper lifting force is sealed, the overturning moment generated in the upper structure G is prevented, and the damping function is very useful because it shares the upper lifting prevention function.

Moreover, according to the return mechanism 4 in the present damping foundation S, the damping function is exhibited, and even in the earthquake displacement, the initial position can be promptly returned. By installing it, it is possible to easily have a trigger function.

If the trigger mechanism is insufficient with only the recovery mechanism 4, a more complete seismic isolation mechanism can be realized by additionally co-locating the trigger type damping device D.

Further, in the damping foundation S having the locking mechanism 28, the movable base 9 can be easily and accurately set to the initial position by operating the locking mechanism 28 in the initial positioning when installing the damping foundation S. It can be installed on In addition, when a large wind pressure is applied, the lock mechanism 2 8 is operated to reliably move the movable stand 9 into an immobile state and to prevent the upper structure G from shaking. In this case, the lock mechanism 28 is operated at all times or wind pressure is applied. You may take any of the following modes: In addition, when a ground motion acts in this state, the earthquake is detected and the lock is released, and the seismic isolation function is exerted with the action of a reed.

(Other aspects)

The present invention is not limited to the above embodiments.

In the above embodiment, the movable base 9 has the restraining beam 8 disposed in the restraining groove 20 recessed in the upper surface thereof, but the restraining beam 8 is directly attached without restraining the restraining groove. The upper surface of the movable table 9 may be in contact. In this aspect, it is also possible to adopt an aspect in which an arm member whose upper surface is smoother than the movable base is extended and the upper surface of the arm member is pressed by the restraining beam 8.

This seismic isolation support apparatus S 2 is suitably applied to the base portion of a large structure or a high-rise building, and comprises a base system 1, a movable platform system 2 and a support platform system 3, the support platform System 3 is fixed to column H of the high-rise building.

Second Embodiment

6 to 8 show other embodiments of the damping foundation of the present invention.

In this embodiment, a spread damping base K for a house is shown, and an example of application to a low-rise floor foundation by cast-in-place concrete construction is shown. In the figure, the same reference numerals are attached to the same members as in the previous embodiment.

This damping foundation K is installed between the ground E and the house as the superstructure, that is, the low floor H, supports the load of the low floor H, and transmits it to the ground E, as well as forcing the earthquake etc. Attenuates the vibration of the lower deck H caused by the vibration force.

In the figure, 1 is a base, 2 is a movable base, 3 is a support base, 4 is a return mechanism, and 5 is a buffer mechanism.

More specifically, the base portion 1 includes a concrete base 6 having a smooth surface and a substantially rectangular plate-like spread on the upper surface 6 a, and four columns provided on the base 6. It comprises a member 7 and a restraining beam 8 bridged over the column member 7 while maintaining rigidity at the upper part of the column member 7. The movable base 2 is mainly composed of a concrete movable base 9 having a spread slidably mounted on the upper surface of the base 6, and a restriction hole 18 for receiving the column member 7 is formed in the housing. At the same time, the upper surface of the base 1 is kept in contact with the upper surface by the restraining beam 8. Ru.

The support portion 3 has legs 11 for establishing connection with the low story H on the movable support 9, that is, bases are disposed at a plurality of locations.

The return mechanism 4 is disposed at the upper part of the movable base 9 so as to surround the column member and the buffer mechanism 5 is disposed in the restraining hole 18 so as to surround the column member 7.

Reference numeral 28 denotes a lock mechanism, which is disposed on the movable stand 9 so as to face the restraining beam 8.

A feature of the second embodiment is that the restraining beam 8 directly abuts on the upper surface of the movable table 9.

The operation and effects of the damping base K of the second embodiment conform to the damping base S described above.

FIG. 9 shows another aspect of this embodiment, and shows an example of application by precast construction performed using a prefabricated plate.

In this damping foundation K1, the base part 1 is composed of a base 6, a column member 7, and a restraining beam 8, which is substantially the same as the above in terms of form and configuration.

The movable base 9 is assembled by combining several types of precast versions 9A, 9B, 9C. For the precast version, appropriate materials such as concrete and synthetic resin are selected. The first precast version 9 A has a restraining hole 18 and is arranged at the position of the column member 7. The second precast version 9B is interposed between the first precast version 9A. The second precast version 9B can be taken with different dimensions in the version arranged in the mutually orthogonal directions (X, Y) in the horizontal direction. The third precast version 9 C is placed in the center.

These precast plates 9 A, 9 B, 9 C are provided with convex steps for joints overlapping each other on adjacent side faces, and a tensioning tool consisting of bolts and nuts up and down over these steps 7 is attached.

The lower surfaces of these precast plates 9A, 9B, 9C are smoothed, and the upper surfaces are also smoothed at least at the places where the constraining beams 8 abut.

And the fact that a foundation for achieving a firm joint with the building H is fixed on the upper surface of the precast version 9 A, 9 B, 9 C is the same as the configuration of the previous form.

These precast versions 9 A, 9 B, 9 C are manufactured at the factory, so Careful management is conducted, and the desired strength is expressed with a predetermined accuracy.

The present invention is not limited to the above embodiment, and various design changes can be made within the scope of the basic technical concept of the present invention. That is, the following embodiments are included in the technical scope of the present invention.

In each of the above embodiments, the buffer mechanism 5 is provided, but the buffer mechanism 5 may be omitted.

In each of the above-described embodiments, the base 6 and the movable base 9 are in the sliding form, but a rolling member such as a steel ball may be interposed between the base 6 and the movable base 9 to make the rolling form. Effect of the invention

According to the foundation having damping function of the present invention, that is, damping foundation, the upper structure is isolated from the vibration of the lower structure by the sliding surface between the base and the movable base against the earthquake motion, and the sliding surface is wide, Not only does it form a support surface, but because it is horizontal, even during displacement due to earthquake motion, the upper structure is not adversely affected (for example, longitudinal vibration) and effectively supported while holding a wide support surface. In addition, since this damping foundation is entirely made of a rigid body, it has a high loading capacity on the support surface, and can be miniaturized.

And, the displacement of the earthquake motion can be dealt with in all directions in the horizontal plane by holding a predetermined movement space on this damping foundation.

In particular, in the damping foundation of the present invention, the upper surface of the movable table linked to the upper structure is uniformly pressed and restrained by the restraint beam even in the displacement of the earthquake motion, and the upper lift of the movable table is sealed to cause the overturn in the upper structure. It is a very useful thing that blocks the moment and shares the function of blocking the lift with the damping function.

In addition, the recovery mechanism in this damping foundation can exhibit the damping function and can quickly return to the initial position even during earthquake displacement, but it is easy by introducing a pre-compression force into the recovery mechanism 4. Can have a trigger function.

Claims

Scope of claim: A base system linked to a lower structure such as a foundation or ground, and a movable base system installed to allow horizontal movement to the base system, and an upper part of a building, machine or floor structure, etc. A foundation mounted and fixed on the movable base system and having a damping function;

The base system includes: a base of a rigid body having a sliding surface on the upper surface; a plurality of column members erected in symmetry with the base; and rigidity between the column members at the upper portion of the column members. It consists of a restraining beam that is bridged and maintained.

In the movable stand system, a movable stand of a rigid body is mounted on the upper surface of the base via a sliding surface in a slidable manner, and the movable stand has a movement gap in the sliding direction of the column member. And the upper surface of the movable table is restricted only by movement in the sliding direction by being in contact with the restraining beam.

A damping mechanism comprising a spring member-based return mechanism interposed between the column member and the movable base.