JPH10299286A - Vibration isolation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration isolation structure, which has a simple structure and excellent vibration isolation performance, in which the characteristics of friction damping can be adjusted, by which an impact noise due to a friction disk is not generated even when the structure receives shear deformation and which has high utility. SOLUTION: A through-hole (a hollow section) is formed at the central section of a composite laminate 12, in which rigid plates 14 and non-rigid plates 16 are laminated alternately, and friction disks 20 are laminated and sealed into the hollow section. The friction disk 20 consists of a resin material, in which a silicon polymer is kneaded with an organic high-molecular material, the weight-average molecular weight of the silicon polymer is kept within a range of ten millions or five millions, one kind or more selected from a group composed of a thermoplastic resin such as nylon, polypropylene, polyethylene, polyacetal, polycarbonate, ABS, polystyrene, vinyl chloride, polybutylene terephthalate, polyethylene terephthalate, etc., and a thermo-setting resin such as unsaturated polyester are used as the organic high-molecular material, and the loadings of the silicon polymer are set in 1-20 wt.% to the resin material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation structure, and more particularly to a seismic isolation structure which can be used for a general building which has a heavy load and for a detached house which has a light load.

[0002]

2. Description of the Related Art Conventionally, in order to protect a building from an earthquake, a composite laminate in which a plurality of rigid plates having rigidity such as a plurality of steel plates and soft plates such as rubber having viscoelastic properties are alternately laminated. Buildings are supported by seismic isolation structures having a structure. The seismic isolation structure has a composite laminate to extend the natural frequency of the building, prevent resonance with seismic waves, produce large-amplitude but slow vibrations, and attach a damper to the vibration. In general, a method of converging in a short time by performing the operation is generally used. Here, examples of the damper provided in the composite laminate include a metal rigid rod damper, a friction damper, and a viscous damper. Also,
Without a damper, as a simple structure having high seismic isolation performance, for example, a lead rubber with lead plugs in which a through hole is provided in a composite laminate and lead is enclosed in the hole,
A high damping laminated rubber in which the rubber itself has a high damping property has been proposed. Recently, the present applicant has proposed a seismic isolation structure of a type in which a through hole is provided in the center of a laminated structure and a friction plate is sealed therein. These seismic isolation structures have a simpler structure and higher seismic isolation performance than conventional products.

[0003] In this seismic isolation structure of the friction plate enclosing type, an impact sound is generated when subjected to shear deformation due to a large friction coefficient of a general organic polymer material or a metal material constituting the enclosed friction plate. However, there is a problem that the friction occurs, and the characteristics are limited by the physical properties of the thermoplastic material forming the enclosed friction plate.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a simple structure, excellent seismic isolation performance, and adjustable friction damping characteristics. An object of the present invention is to provide a highly practical seismic isolation structure that does not generate an impact noise caused by a friction plate even when subjected to shear deformation.

[0005]

The seismic isolation structure of the present invention comprises:
A composite laminate is provided in which a plurality of hard plates having rigidity and a plurality of soft plates having viscoelastic properties are alternately laminated between upper and lower face plates, and the composite laminate is provided inside the composite laminate. A seismic isolation structure having a hole penetrating through the body and a friction plate sealed in the hole, wherein the friction plate is made of a resin material obtained by kneading a silicone polymer with an organic polymer material. I do.

[0006] The silicone polymer used here is
The weight average molecular weight is preferably in the range of 1,000 to 5,000,000, and the amount added is preferably 1 to 20% by weight based on the resin material.

The organic polymer materials used for the friction plate include thermoplastic resins such as nylon, polypropylene, polyethylene, polyacetal, polycarbonate, acrylonitrile-butadiene-styrene copolymer (ABS), polystyrene, vinyl chloride, and poly (vinyl chloride). It is at least one selected from the group consisting of butylene terephthalate and polyethylene terephthalate.

In the seismic isolation structure of the present invention, as the resin material constituting the friction plate, a material obtained by kneading 1 to 20% by weight of a silicone polymer with an organic polymer material is used. As a result, the friction plate itself is provided with an appropriate damping property, and the impact noise caused by friction between the friction plates can be reduced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a seismic isolation structure of the present invention will be described in detail.

The seismic isolation structure of the present invention has a structure in which a plurality of hard plates and soft plates are alternately stacked, a through-hole is provided inside a composite laminate, and a friction plate is sealed in the hole. The friction plate used here is characterized by adding a silicone polymer to an organic polymer material.

An embodiment of the seismic isolation structure of the present invention will be described with reference to the drawings. FIG. 1 is a schematic sectional view showing an embodiment of a seismic isolation structure 10 according to a first embodiment of the present invention described later. The composite laminate 12 constituting the seismic isolation structure 10 includes a hard plate 14 and a soft plate 1.
6 are alternately laminated, a through-hole (hollow portion) is provided in the center of the composite laminate 12, and a friction plate 20 is formed in the hollow portion.
Are stacked and sealed. A rubber layer 21 for protecting the soft plate 16 is disposed between the friction plate 20 and the composite laminate 12, and the composite laminate 12 is covered with a skin rubber 18. A holding plate 24 having the function of a pressure transmitting plate is arranged on the laminated body of the friction plates 20,
A female screwed steel plate 23 of 68 is joined, and a male-threaded hexagon socket head holding bolt is arranged as the upper cover 26,
The upper pig 26 is tightened to apply a sealing force to the friction plate 20 laminate.

First, a silicone polymer which can be used as a resin material forming a friction plate in the present invention will be described. Here, the silicone polymer refers to an organosilicon polymer having a siloxane bond (Si-O-Si) as a main chain.

More specifically, for example, dimethylpolysiloxane having a methyl group in the side chain, methylhydrogenpolysiloxane having a methyl group and hydrogen in the side chain, and methylmethyl having a methyl group and phenyl group in the side chain. Phenylpolysiloxane, methylvinylpolysiloxane containing methyl and vinyl groups in the side chain, methylphenylvinylpolysiloxane containing methyl group, phenyl group and vinyl group in the side chain, methyl group and 3,3, Methyl 3,3,3-trifluoropropyl polysiloxane containing a 3-trifluoropropyl group is exemplified.

Specifically, commercially available products such as silicone concentrate BY27-005 (manufactured by Dow Corning Toray Silicone Co., Ltd., molecular weight: 450,000) obtained by mixing dimethylpolysiloxane with 6,6 nylon are preferably used. obtain.

The weight average molecular weight of the silicone polymer used in the present invention is from 1,000 to 5,000,000, preferably from 5,000 to 1,000,000, more preferably from 1 to 5,000,000.
Not less than 10,000 and not more than 1 million. Weight average molecular weight of 1000
If it is less than 1, the physical properties of the silicone polymer become oily, it is difficult to mix it with the organic polymer material, and there is a possibility that oil bleeds may occur over a long period of use, and there is a problem in durability and reliability. There is. On the other hand, ultra-high molecular weight silicone polymers having a weight average molecular weight of more than 5 million are difficult to manufacture and difficult to obtain, and because of their high viscosity, they are mixed with organic polymer materials to prepare uniform resin materials. Is difficult.

As the organic polymer material used for the friction plate according to the present invention, specifically, for example, as a thermoplastic resin, polyamide (nylon), polyethylene, polypropylene, polystyrene, poly-P-xylene, polyvinyl acetate , Polyacrylate, polymethacrylate, polyvinyl chloride, polyvinylidene chloride, fluoroplastics, polyacrylonitrile, polyvinyl ether, polyvinyl ketone, polyether, polycarbonate, thermoplastic polyester, diene plastic, aromatic polyamide, polyphenylene, silicone, etc. As the thermosetting resin, phenol resin, unsaturated polyester, polyurethane plastic, epoxy resin, and the like can be used. Among them, thermoplastic resins such as nylon, polypropylene, polyethylene, polyacetal, polycarbonate, ABS, polystyrene, vinyl chloride, polybutylene terephthalate (PB) are preferable from the viewpoint of material properties and availability when kneading the silicone polymer.
T), polyethylene terephthalate (PET) and the like are preferable. These organic polymer materials are
Using this as a matrix, it can also be used as a material filled with a fiber reinforced resin (FRP) reinforced with reinforcing fibers such as glass fibers, carbon fibers, and metal fibers or inorganic particles. These resins may be used alone or in combination of two or more.

The addition amount of the silicone polymer used in the present invention is 1% by weight to 20% by weight, preferably 1.5% by weight to 15% by weight, based on the resin material. More preferably, it is 2% by weight to 10% by weight.
When the amount of the silicone polymer exceeds 20% by weight,
The strength of the friction plate is greatly reduced, and the objective cannot be achieved in terms of durability performance. The amount of the silicone polymer added is 1% by weight.
If it is less than 1, the reduction of the friction coefficient cannot be achieved, and the effect of the present invention cannot be obtained.

When a silicone polymer is added to an organic polymer material as a resin material constituting the friction plate, the friction coefficient between the resins is arbitrarily adjusted by adjusting the type, molecular weight and addition amount of the silicone polymer. Thus, not only the friction characteristics between the friction plates but also the damping property of the friction plate laminate can be adjusted.

FIG. 2 shows, as an example, a silicone polymer (Silicone Concentrate BY27-005, manufactured by Dow Corning Toray Silicone Co., Ltd.) in 6,6 nylon, which is an organic polymer material, and a silicone amount of 0-1.
4 is a graph showing the relationship between the amount of silicone polymer added and the coefficient of friction of a material added to be 0% by weight.

It can be seen that the addition of the silicone polymer greatly reduces the coefficient of friction. Here, the friction coefficient was measured in two ways: a case where a 1.5 mm thick friction plate was sealed in the hollow portion of a hollow laminated rubber having an outer diameter of 160φ and an inner diameter of 70φ, and a case where the friction plate was not sealed. , The strain dependency and the surface pressure dependency of the damping constant Tanδ are measured. When the relationship between the frictional energy of the friction plate and the amount of deformation is obtained from the result, the inclination becomes the frictional force. The friction coefficient can be derived from the relationship between the friction force and the load. Here, the shear modulus G and the damping constant Tan δ were measured by a small dynamic elasticity tester manufactured by Sam Electronics Co., Ltd.

The absolute value of the coefficient of friction of the friction plate cannot be specified because it varies depending on the material. For example, in the case of 6,6 nylon, from 0.1 to 0.4 in view of damping properties and prevention of impact noise.
If it is lower than this, the seismic isolation performance due to friction is reduced, and if it exceeds the upper limit, the effect of preventing the impact noise during shear deformation becomes insufficient.

The manufacturing method in the case of using a thermoplastic resin as the organic polymer material of the friction plate according to the present invention will be described. This friction plate is prepared by kneading a silicone polymer to be used in advance with a thermoplastic resin of the same kind as a partner to be mixed. For example, a master batch of, for example, 50% by weight is prepared, and the master batch and the thermoplastic resin are mixed and molded by ordinary injection molding or extrusion molding to obtain a master batch.

The shape of the laminated body in which the friction plates used in the present invention are laminated is not particularly limited, such as a cylinder, a triangular prism, a quadrangular prism, and generally a polygonal prism. The size of the laminate in which the friction plates are laminated is such that the cross-sectional area is 1.0% or more and 64% or less of the cross-sectional area of the composite laminate. Preferably, 1
% Or more and 50% or less, further 1% or more and 25% or less.
More preferably, it is at least 2% and at most 5%. If the cross-sectional area of the friction plate exceeds 64%, (1)
(2) The shear modulus at a shear strain of 100% is larger than that in the case where the friction plate laminate is not combined, and the desired seismic isolation effect cannot be obtained. Occurs. If the cross-sectional area of the friction plate is less than 1.0%, the desired effect cannot be achieved because the damping effect cannot be obtained.

The friction plate filled in the hollow portion formed in the composite laminate is filled by applying a sealing force, and a surface pressure of 5 to 150 kgf / cm ² is used as a stress for sealing the friction plate. Preferably, it is suitably used at 5 to 50 kgf / cm ² , and more preferably, 5 to 20 kgf / c.
m ² is preferably used.

The sealing force (pressing force) of the friction plate can be controlled by adjusting the tightening torque of a screw of a lid having a screw thread provided on an upper portion of the friction plate. That is, a screw is cut in the upper surface plate, a lid having a screw thread adapted to the screw is provided, and the sealing force applied to the friction plate is adjusted to be constant by making the screw tightening torque constant. The size of the screw is preferably the same as or smaller than the friction plate.

Hereinafter, the composite laminate constituting the seismic isolation structure of the present invention will be described. The material used for the viscoelastic soft plate constituting the composite laminate refers to a material having a 50% modulus of 1 to 10 kgf / cm ² , preferably 1 to 8 kgf / cm ² .
Kgf / cm ² . The 50% modulus of various materials can be measured, for example, according to JIS K6251.

The material used for the soft plate of the composite laminate of the present invention includes organic materials such as thermoplastic rubber, urethane rubber, various vulcanized rubbers, unvulcanized rubber, finely crosslinked rubber, plastics, and the like. Various materials such as an inorganic material such as foam, asphalt and clay, and a mixed material thereof can be used. These materials may be used alone, or a combination of two or more materials with a high damping material on the inner side and a material with good creep performance on the outer side may be used.

These materials are formed into a flat plate and used as a soft plate. The shape of the soft plate is not particularly limited. However, since the seismic isolation structure of the present invention has a columnar hollow portion in the composite laminate, the soft plate shape needs to have a hollow portion in the center. It is. When the seismic isolation structure is cylindrical and the hollow part is also cylindrical, each soft plate has the shape of a donut disk, but if the outer shape or hole shape is a prism, it is a square shape that matches the shape. Is also good. The thickness of the soft plate is not particularly limited and can be selected depending on the material to be used and the desired seismic isolation performance.
Those having a thickness of about m are used.

Further, as the hard plate in the present invention, various materials having required rigidity such as metal, ceramics, plastics, FRP, polyurethane, wood, paper board, slate board, decorative board and the like can be used. Here, the desired rigidity greatly varies depending on design conditions, but means rigidity that does not easily cause a buckling phenomenon when subjected to shear deformation.

The thickness and shape of the hard plate are not particularly limited.
The thickness can be selected depending on the material to be used and the desired seismic isolation performance. Generally, the thickness is about 0.5 to 5 mm. The shape may be any other than having a hollow portion at the center, similarly to the soft plate to be laminated, but usually the same shape as the soft plate used in combination is used.

The above-mentioned soft plate and hard plate are alternately laminated in a plurality of stages to form a composite laminate. The soft plate and the hard plate have different shapes, areas and thicknesses depending on the required seismic isolation performance as described above, but the composite laminate improves the seismic isolation performance of the composite laminate inside as described above. Since a hollow portion for arranging each means described later is required, usually, both the soft plate and the hard plate have the same donut disk shape or a rectangular plate shape having a hollow portion, and have the same surface area. Things are used.

In order to impart weather resistance to the composite laminate used in the seismic isolation device of the present invention, the outside of the composite laminate may be covered with a material having excellent weather resistance. Examples of the coating material include butyl rubber, acrylic rubber, polyurethane, silicone rubber, fluorine rubber, polysulfide rubber, ethylene propylene rubber (EPM, EPDM), chloroprene rubber, and the like, and heat-resistant materials such as hypalon, chlorinated polyethylene, and ethylene vinyl acetate rubber. Plastic rubber, resin and the like can be used. These materials may be used alone or as a blend of two or more. Natural rubber, isoprene rubber, butadiene rubber,
You may blend with styrene butadiene rubber, nitrile rubber, etc.

A rubber member having excellent abrasion may be disposed on the hole side of the composite laminate of the present invention to protect the soft plate from being broken by friction between the friction plate and the soft plate.

The seismic isolation structure of the present invention has a surface pressure of 5 kgf / c.
It is used in a range of m ^{2 to} 200 kgf / cm ² . Preferably, the surface pressure is 5 kgf / cm ² or more and 150 kgf / cm ²
It is preferably used at ² or less.

According to the seismic isolation structure of the present invention, a through-hole is formed in the interior of the composite laminate, and a friction plate having a low coefficient of friction is sealed therein. This paved the way for the practical use of seismic structures.

The seismic isolation structure of the present invention can be used not only alone as a seismic isolation device, but also incorporated into various seismic isolation devices to take advantage of its seismic isolation performance.

As another application, by utilizing this low coefficient of friction, parts using expensive fluorine resin (Teflon or the like) at present, such as a friction damper used together with seismic isolation rubber, can be used. Substitution can reduce the cost of the seismic isolation device.

[0038]

【Example】

(Embodiment 1) FIG. 1 shows a seismic isolation structure 1 according to an embodiment of the present invention.
0 shows a schematic sectional view.

As the composite laminate 12, a hard plate 14 (internal steel plate) (outer diameter 160 mmφ, inner diameter 74 mmφ, thickness 1.
0 mm) and a soft plate 16 (50% modulus:
1.6 kgf / cm ² , tensile strength: 50 kgf / c
It is composed of 13 pieces (total rubber thickness: 21 mm) of m ² , elongation at break: 810%, and a thickness of 1.6 mm using a rubber material. A hollow portion having a diameter of 70 mm was formed at the center of the composite laminate 12.

A high molecular weight silicone polymer (manufactured by Dow Corning Toray Silicone Co., Ltd., silicone concentrate BY27-005, molecular weight: 6,6 nylon)
450,000) was added by 5% by weight as a silicone amount by injection molding to obtain a material having a diameter of 69 mm and a thickness of 2 mm.
To form a friction plate 20.

Sixteen friction plates 20 are placed in the hollow portion of the composite laminate 12, and a thickness of 5 mm and a diameter of 69 mm are placed thereon.
Was disposed as a pressure propagation plate. The soft plate 16 of the composite laminate 12 by the friction plate 20 is provided on the inner peripheral portion of the hollow portion.
A rubber layer 21 having a thickness of 2 mm was disposed in order to prevent damage to the rubber. An M68 threaded steel plate 23 is joined to the flange 22 and the M68 bolt 26 is tightened to a torque of 400 kg.
By pushing in at f-cm, the friction plate 20 was sealed. The tightening force at this time was 10 kgf / cm ² . At this time, the friction coefficient of the friction plate 20 was 0.12. Comparative Example 1 A seismic isolation structure was manufactured in the same manner as in Example 1 except that the material of the friction plate was nylon 6,6.
The friction coefficient of the friction plate used here was 0.56. Evaluation Test Each of the seismic isolation structures of Example 1 and Comparative Example 1 was
A load of 4 Tonf (surface pressure: 20 kgf / cm ² ) is applied, a sine wave having a frequency of 0.2 Hz is subjected to shear deformation at a shear strain of 100%, and the deformation state of the laminated rubber at that time is observed.

As a result, in the seismic isolation structure of Comparative Example 1, the movement of the laminated rubber portion is temporally delayed with respect to the horizontal shear deformation of the lower flange, and follows the deformation of the lower flange. In addition, a loud impact sound was generated during the shear deformation.

On the other hand, in Example 1, the movement of the laminated rubber portion was smooth with respect to the horizontal shear deformation of the lower flange, and the time delay observed in Comparative Example 1 was not observed, and no impulsive sound was generated. Was.

As is apparent from the above results, by adding a silicone polymer to the organic polymer material as the friction plate material, the friction plate can be exempted from the friction plate damping type as compared with the friction plate formed of only the organic polymer material. The seismic structure could be made more practical.

[0045]

According to the present invention, the seismic isolation performance is excellent with a simple structure, the characteristics of frictional damping can be adjusted, and even when subjected to shear deformation, an impulsive sound caused by the friction plate is generated. No, we could provide a highly practical seismic isolation structure.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a seismic isolation structure of a first embodiment.

FIG. 2 is a graph showing a relationship between a silicone polymer addition amount and a friction coefficient of a resin material obtained by adding a silicone polymer to 6,6 nylon which is an organic polymer material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Seismic isolation structure 12 Composite laminated body 14 Hard plate 16 Soft plate 18 Outer rubber 20 Friction plate 21 Rubber layer for protection of soft plate 22 Flange 23 Threaded steel plate 26 Threaded bolt (lid)

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI E04B 1/36 E04B 1/36 D F16F 15/02 F16F 15/02 L // C08L 77/06 C08L 77/06

Claims (4)

[Claims] 1. A composite laminate in which a plurality of hard plates having rigidity and a plurality of soft plates having viscoelastic properties are alternately laminated between upper and lower face plates is provided. A seismic isolation structure in which a hole penetrating through the composite laminate is provided and a friction plate is sealed in the hole, wherein the friction plate is made of a resin material obtained by kneading a silicone polymer with an organic polymer material. A seismic isolation structure characterized by becoming. 2. The seismic isolation structure according to claim 1, wherein the weight average molecular weight of the silicone polymer added to the organic polymer material is in the range of 1,000 to 5,000,000. 3. The organic polymer material is selected from a thermoplastic resin group consisting of nylon, polypropylene, polyethylene, polyacetal, polycarbonate, acrylonitrile-butadiene-styrene copolymer, polystyrene, vinyl chloride, polybutylene terephthalate, and polyethylene terephthalate. The seismic isolation structure according to claim 1, wherein the structure is one or more types. 4. The amount of the silicone polymer added to the organic polymer material is 1 to 20 with respect to the resin material.
The seismic isolation structure according to claim 1, wherein the weight is% by weight.