WO2016084363A1 - 免震装置 - Google Patents
免震装置 Download PDFInfo
- Publication number
- WO2016084363A1 WO2016084363A1 PCT/JP2015/005831 JP2015005831W WO2016084363A1 WO 2016084363 A1 WO2016084363 A1 WO 2016084363A1 JP 2015005831 W JP2015005831 W JP 2015005831W WO 2016084363 A1 WO2016084363 A1 WO 2016084363A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seismic isolation
- isolation device
- graphite
- laminated
- damping
- Prior art date
Links
- 238000002955 isolation Methods 0.000 title claims abstract description 55
- 238000013016 damping Methods 0.000 claims abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 33
- 239000010439 graphite Substances 0.000 claims abstract description 33
- 239000011231 conductive filler Substances 0.000 claims abstract description 29
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- 239000011347 resin Substances 0.000 claims abstract description 25
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Images
Classifications
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/51—Elastic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/56—Damping, energy absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2419/00—Buildings or parts thereof
Definitions
- the present invention relates to a seismic isolation device having an attenuation body.
- a seismic isolation device having a laminated elastic body in which an elastic layer and a rigid layer are alternately laminated and a lead plug filled in a cylindrical hollow portion defined by an inner peripheral surface of the laminated elastic body is disclosed in Patent Literature
- Patent Literature As known from 1 and 2, after supporting the load of the superstructure, transmission of ground vibration due to earthquakes etc. to the superstructure is prevented as much as possible by the laminated elastic body and transmitted to the superstructure It is installed between the ground and the superstructure so that the vibration is damped as quickly as possible by the lead plug.
- Such a lead plug used in a seismic isolation device preferably absorbs vibration energy, and even after plastic deformation, it easily recrystallizes due to the heat generated along with the vibration energy absorption and does not cause mechanical fatigue. It is extremely excellent as an energy absorber.
- Patent Document 3 proposes a seismic isolation device in which a plug manufactured from a composition in which a powder such as iron powder is blended with an elastomer composition is incorporated, but even with such a seismic isolation device, surface pressure dependency is also known. Is not taken into account.
- the present invention has been made in view of the above-mentioned points, and the object of the present invention is to have each dependence on the seismic isolation effect, for example, stable strain dependence, temperature dependence and surface pressure dependence, and repeated excitation. It is an object of the present invention to provide a seismic isolation device that has a small energy change in yield load and that has stable energy absorption performance against repeated excitation in long-term earthquakes.
- the seismic isolation device of the present invention includes a laminated elastic body in which rigid layers and elastic layers are alternately laminated, and at least one columnar hollow portion defined by at least an inner peripheral surface of the laminated elastic body, preferably a cylindrical hollow.
- the seismic isolation device of the present invention also includes a laminated elastic body in which rigid layers and elastic layers are alternately laminated, and at least one columnar hollow portion defined by at least an inner peripheral surface of the laminated elastic body, preferably a cylindrical shape.
- a columnar hollow portion preferably a columnar body made of a plurality of attenuation bodies stacked in the axial direction of the cylindrical hollow portion, preferably a columnar body, and arranged in the hollow portion, each attenuation body,
- a heat conductive filler, graphite, and a thermosetting resin are included.
- the damping body includes at least a thermal conductive filler that attenuates repeated shear deformation caused by added vibration by mutual friction, and at least repeated shear deformation caused by the added vibration. It contains graphite that is attenuated by friction with the thermally conductive filler, and a thermosetting resin that adheres to each other and cures at a high temperature to maintain the initial shape of the attenuation body. In the earthquake that acts, the thermosetting resin does not melt even if the temperature of the attenuation body increases due to energy absorption.
- the seismic isolation device of the present invention including the columnar body formed of a plurality of attenuation bodies arranged in the columnar hollow portion and stacked in the axial direction of the columnar hollow portion, the relative distance between the attenuation bodies is A preferable displacement followability of the column body can be obtained by the displacement and the shearing (deflection) deformation in each attenuation body.
- thermosetting resin is cured as a result of its shape retention being canceled by the shear deformation of the first earthquake attenuation body, while being crushed and granulated by the shear deformation after curing.
- subsequent earthquakes including after, the mutual friction between the thermosetting resin itself and the mutual friction between the thermal conductive filler and graphite contributes similarly to the attenuation of repeated shear deformation by the thermal conductive filler and graphite. It is like that.
- the thermally conductive filler also has a shape retention effect that holds the shape of the damping body and a heat dissipation effect that dissipates frictional heat generated in the damping body. It is possible to prevent the temperature rise of the column body due to loss of shape and earthquake.
- the thermally conductive filler is aluminum oxide (Al 2 O 3 ), calcium oxide (CaO 2 ), magnesium oxide (MgO), zinc oxide (ZnO), titanium oxide (TiO 2 ), silicon oxide (SiO 2 ).
- Metal oxides such as iron oxide (Fe 2 O 3 ), nickel oxide (NiO) and copper oxide (CuO), boron nitride (BN), aluminum nitride (AlN) and silicon nitride (Si 3 N 4 ) Metal nitride, boron carbide (B 4 C), aluminum carbide (Al 4 C 3 ), metal carbide such as silicon carbide (SiC) and titanium carbide (TiC), and aluminum hydroxide [Al (OH) 3 ], hydroxylation Magnesium [Mg (OH) 2 ], sodium hydroxide (NaOH), calcium hydroxide [Ca (OH) 2 ] and zinc hydroxide [Zn (OH) 2 ] including one or more kinds of metal hydroxide particles such as magnesium oxide, aluminum oxide, silicon oxide, aluminum nitride, silicon nitride, boron nitride, and silicon carbide. Further, it is more preferable as a heat conductive filler from the viewpoint of dispers
- the thermally conductive filler preferably has an average particle size of 10 ⁇ m to 50 ⁇ m, and in particular, particles having different particle sizes, for example, fine metal oxides having an average particle size of about 10 ⁇ m and coarse particles having an average particle size of about 50 ⁇ m.
- a thermally conductive filler formed by mixing a metal oxide with a particle size in a ratio of 50:50 or 40:60 the gap between dispersed metal oxide particles with a coarse particle size of about 50 ⁇ m is a fine particle size of about 10 ⁇ m. Since it is filled with metal oxide particles, the continuity of the metal oxide particles is obtained and the heat dissipation is increased, and the particles are oxidized with different metal oxide particles such as aluminum oxide particles. In a thermally conductive filler formed by blending magnesium particles at a ratio of 50:50, heat dissipation is enhanced.
- the blending ratio of the thermally conductive filler selected from particles of these metal oxides, metal nitrides, metal carbides, metal hydroxides, metal carbides and the like to the attenuation body is preferably 35 to 70% by volume.
- the blending ratio is less than 35% by volume, instability is caused in the damping property evaluated by the area of the region surrounded by the hysteresis (history) curve.
- the blending ratio exceeds 70% by volume, the moldability of the damping body is increased. This makes it difficult to produce an attenuation body having a desired shape, for example, a disc shape (disc shape) or a column shape.
- Graphite preferably consists of at least one of natural graphite such as artificial graphite and flaky graphite, and flaky graphite as a preferred example of graphite is flaky (flaky), compared to granular graphite It has a large surface area and acts to dampen external forces such as vibrations and shocks by the inter-layer sliding friction generated when the damping body receives external forces such as vibrations and shocks, and friction with the thermally conductive filler. Is more effective.
- the graphite preferably has an average particle size exceeding 100 ⁇ m, and the scaly graphite preferably has an average particle size of 100 ⁇ m to 1000 ⁇ m, more preferably 500 ⁇ m to 700 ⁇ m and a particle size with a large contact area. Is used.
- the blending ratio of graphite, particularly scaly graphite, with respect to the attenuation body is preferably 5 to 50% by volume. If the blending ratio is less than 5% by volume, sufficient frictional damping will not be exhibited, and if the blending ratio exceeds 50% by volume, the moldability of the damping body may be deteriorated. Strength is reduced and brittleness is developed.
- the thermosetting resin imparts adhesiveness and compression moldability to the material for forming the attenuation body.
- the thermosetting resin exhibits an effect of reducing the porosity and improves durability.
- the blending ratio of the thermosetting resin to the attenuation body is preferably 10 to 30% by volume. If the blending ratio is less than 10% by volume, it is difficult to impart sufficient tackiness to the material for forming the attenuation body. If the blending ratio exceeds 30% by volume, the kneading processability and moldability of the damping body forming material are deteriorated. There is a risk of causing it.
- the thermosetting resin preferably contains a phenol resin.
- phenol resin various phenols and formaldehyde are reacted in the presence of an alkali catalyst in the presence of a resol type phenol resin or an acid catalyst.
- a novolak type phenol resin obtained by the reaction can be exemplified. Specifically, “Resitop (alkylphenol resin having an alkyl group having 8 carbon atoms): softening point of 78 to 105 ° C.” manufactured by Gunei Chemical Industry Co., Ltd. It can be exemplified.
- the attenuation body includes 35 to 70% by volume of a heat conductive filler, 5 to 50% by volume of graphite, and 10 to 30% by volume of a thermosetting resin.
- the attenuation body may further contain at least one of rubber powder and crystalline polyester resin of at least one of vulcanized rubber and silicone rubber as another component.
- the blending ratio of the powder is preferably 40% by volume or less, more preferably 7 to 30% by volume with respect to the component composition of the attenuation body, and the blending ratio of the crystalline polyester resin is based on the component composition of the attenuation body. It is preferably 25% by volume or less, more preferably 3 to 22% by volume.
- Rubber powder especially vulcanized rubber powder, imparts flexibility to the damping body obtained by molding, promotes ease of movement of the damping body, and plays a role of increasing energy absorption.
- the vulcanized rubber powder is preferably natural rubber (NR), polyisoprene rubber (IR), polybutadiene rubber (BR), styrene-butadiene rubber (SBR), chloroprene rubber (CR), ethylene-propylene rubber (EPM, EPDM), nitrile rubber (NBR), butyl rubber (IIR), halogenated butyl rubber, acrylic rubber (ACM), average particle diameter formed by pulverizing vulcanized rubber such as ethylene vinyl acetate rubber or ethylene-methyl acrylate copolymer Is used, and one or more of these pulverized powders are selected and used.
- NR natural rubber
- IR polyisoprene rubber
- BR polybutadiene rubber
- SBR styrene-butadiene rubber
- Silicone rubber is an inorganic rubber and has excellent features such as heat resistance, cold resistance, weather resistance, electrical insulation, flame retardancy, and non-toxicity.
- silicone rubber methyl silicone rubber (MQ)
- Preferred examples include vinyl methyl silicone rubber (VMQ) and phenyl methyl silicone rubber (PMQ).
- the blending ratio of the rubber powder is from a thermally conductive filler, graphite, particularly flaky graphite and a thermosetting resin, or a thermally conductive filler, graphite, particularly flaky graphite, a thermosetting resin and a crystalline polyester resin.
- a thermally conductive filler graphite, particularly flaky graphite and a thermosetting resin
- it is 40 volume% or less, more preferably 7 to 30 volume%.
- Examples of crystalline polyester resins include aliphatic polyesters such as polyglycolic acid, polylactic acid, polycaprolactone and polyethylene succinate, polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate and Examples include semi-aromatic polyesters such as polycyclohexanedimethylene terephthalate, ester elastomers, and the like.
- Specific examples of the crystalline polyester resin include “Byron GM900”, “Byron GM920” and “Byron GM990” (all are trade names) manufactured by Toyobo Co., Ltd.
- the molecular weight of the crystalline polyester resin is preferably 10,000 to 35,000, more preferably 15,000 to 30,000.
- the “average particle size” means a particle size at an integrated value of 50% in the particle size distribution obtained by a laser diffraction / scattering method.
- a columnar body made of an attenuation body disposed in a columnar hollow part, preferably press-fitted into the columnar hollow part, supports a load in the laminating direction together with the laminated elastic body.
- the column may exclusively absorb vibration energy.
- the rigid layer having rigidity and the elastic layer having elasticity are annular in a preferred example, but instead of this, a polygon, for example, a quadrangular ring, may be used.
- a polygon for example, a quadrangular ring
- it is usually cylindrical, but when the rigid layer and elastic layer are annular, it is cylindrical, and instead, the rigid layer and elastic layer are polygonal.
- a quadrangular ring shape a quadrangular cylindrical shape may be used.
- the present invention there may be one or a plurality of columnar hollow portions.
- the present invention is applied to all the columnar hollow portions. It is not necessary to arrange the columnar body made of the damping body according to the above, and from the viewpoint of the required function and effect, the columnar body made of the damping body is preferably arranged by being press-fitted into some columnar hollow portions.
- the column body arranged in one or a plurality of columnar hollow parts is composed of a plurality of attenuation bodies, all the plurality of attenuation bodies need to be composed of the attenuation bodies according to the present invention. However, some of the attenuation bodies may be attenuation bodies according to the present invention.
- a seismic isolation device having absorption performance can be provided.
- FIG. 1 is a longitudinal sectional view of a preferred example of an embodiment of the seismic isolation device of the present invention.
- FIG. 2 is an explanatory plan view of the laminated elastic body of the example shown in FIG.
- FIG. 3 is a perspective explanatory view of the cylindrical body of the example shown in FIG.
- FIG. 4 is an operation explanatory diagram of the example shown in FIG.
- FIG. 5 is an explanatory diagram showing the relationship between the horizontal displacement and the horizontal load in the example shown in FIG.
- FIG. 6 is an explanatory diagram of test results on the relationship between the horizontal displacement and the horizontal load in the example shown in FIG. 1 at a vertical surface pressure of 15 MPa.
- FIG. 7 is an explanatory diagram of test results on the relationship between the number of vibrations and the yield load maintenance rate.
- FIG. 8 is an explanatory diagram of test results on the relationship between the number of vibrations and the yield load maintenance rate.
- the seismic isolation device 1 of this example includes a plurality of elastic layers 3 made of an elastic plate 2 made of an annular rubber or the like, a thin rigid steel plate 4 made of an annular rigid metal plate, etc.
- a cylindrical body 14 made of a disc-shaped (disk-shaped) damping body 12, an upper flange plate 15 and a lower flange plate 16 connected to the thick rigid steel plates 5 and 6 via bolts 13, respectively, and a cylindrical hollow On the upper and lower surfaces of the attenuator 12 located at the upper and lower ends of the portion 11.
- a disk-shaped (disk-shaped) shear key 17 that fixes the upper flange plate 15 and the lower flange plate 16 and the thick rigid steel plates 5 and 6 with respect to the shear direction (horizontal direction) H.
- the cylindrical hollow portion 11 in which the individual attenuation bodies 12 are densely stacked and stacked is formed by the upper surface 18 of the lower shear key 17 and the lower surface 19 of the upper shear key 17. It is prescribed.
- the thick rigid steel plates 5 and 6 sandwiching the elastic layer 3 and the thin rigid steel plate 4 in the axial direction V are disposed on the upper and lower end surfaces of the laminated elastic body 8 and are positioned at the lowermost end of the cylindrical hollow portion 11.
- the attenuating body 12 is disposed in close contact with the inner peripheral surface of the thick rigid steel plate 6 that defines the lower end of the cylindrical hollow portion 11, and is located at the uppermost end of the cylindrical hollow portion 11. Are arranged in close contact with the inner peripheral surface of the thick rigid steel plate 5 that defines the upper end of the cylindrical hollow portion 11.
- Each attenuation body 12 is defined by a circular one end face 20, a circular other end face 21 facing the one end face 20, and one end face 20 and a cylindrical side face 22 bridging the other end face 21.
- One end face 20 of the damping body 12 is on the one hand in the circular recess 25 of the upper flange plate 15 and on the other hand in the circular recess 26 of the thick rigid steel plate 5, respectively.
- the other end surface 21 of the attenuation body 12 located at the lowermost end is in close contact with the lower surface 19 of the upper shear key 17 fitted to the lower end of the circular recess 27 of the lower flange plate 16.
- the lower flange plate 16 and the upper surface 18 of the lower shear key 17 fitted to the thick-walled rigid steel plate 6 are in close contact with each other.
- the other attenuating bodies 12 other than the attenuating body 12 to be placed are in close contact with the other end face 21 and the one end face 20 of the adjacent attenuating bodies 12 at the one end face 20 and the other end face 21, respectively.
- the energy of the shear deformation is absorbed by the relative shearing (deflection) deformation of the other end surface 21 with respect to the one end surface 20 in the horizontal direction H that is parallel to the one end surface 20 to attenuate the shear deformation. It has become.
- the seismic isolation device 1 is connected and fixed to the upper structure 31 on the upper flange plate 15 side and the base 32 which is the lower structure on the lower flange plate 16 side via bolts 33, and thus the upper structure.
- the seismic isolation device 1 disposed between the object 31 and the foundation 32 supports the load in the stacking direction (vertical direction) V of the upper structure 31 by the stacked elastic body 8 and the cylindrical body 14. .
- Each of the attenuation bodies 12 basically contains a thermally conductive filler, graphite, and a thermosetting resin that mainly functions as a tackifier.
- Each attenuation body 12 weighs at least one of a heat conductive filler, scaly graphite as a graphite and a thermosetting resin powder or a rubber powder and a crystalline polyester resin to be added to these in a predetermined amount,
- the mixture was put into a stirring mixer such as a mixer and uniformly stirred and mixed.
- the mixture was put into a kneader (heater kneader), heated and kneaded, and the heat-kneaded attenuation material was heated to a temperature of 80 to 150 ° C.
- the seismic isolation device 1 having the cylindrical body 14 formed by stacking the disk-shaped (disk-shaped) attenuation bodies 12 in multiple layers, first, an annular rubber plate or the like having a circular hole in the center is used.
- the elastic plate 2 and the thin rigid steel plate 4 made of an annular rigid metal plate or the like having a circular hole in the central portion are alternately laminated, and an annular shape having a circular hole in the central portion on the lowermost surface and the uppermost surface thereof.
- Thick-walled rigid steel plates 5 and 6 made of a rigid metal plate or the like are arranged, and these are fixed to each other by vulcanization under pressure in a mold, and a cylindrical laminate having a columnar hollow portion 11 at the center.
- An elastic body 8 is manufactured, and then a plurality of disk-shaped (disk-shaped) attenuation bodies 12 are formed in the cylindrical hollow portion 11 so that a cylindrical body 14 is formed in the cylindrical hollow portion 11.
- a (disk-shaped) attenuation body 12 is press-fitted and laminated. The press-fitting of the attenuating body 12 is performed so that the disc-shaped (disc-shaped) attenuating body 12 does not have a gap with respect to the inner peripheral surface 10 of the laminated elastic body 8 and a plurality of disc-shaped (disc-shaped)
- Each of the damping bodies 12 is sequentially pushed into the cylindrical hollow portion 11 by a hydraulic ram or the like.
- the shear key 17 is placed at the lower end and the upper end of the cylindrical hollow portion 11, the upper surface 18 is placed at one end surface 20 of the attenuating body 12 located at the lowermost end, and the lower surface 19 is placed at the lower end of the damping body 12.
- the upper and lower flange plates 15 and 16 are attached to the thick-walled rigid steel plates 5 and 6 via bolts 13, respectively.
- rubber or the like is applied to the elastic layer 3 made of the elastic plate 2 so as to cover the outer peripheral surfaces of the thin rigid steel plate 4 and the thick rigid steel plates 5 and 6.
- the covering layer 9 made of may be formed integrally.
- a plurality of disk-shaped (disk-shaped) damping bodies 12 stacked in multiple layers along the axial direction of the cylindrical hollow portion 11 are press-fitted into the cylindrical hollow portion 11, and vibrations are generated.
- the upper structure 31 is moved in the horizontal direction H with respect to the base 32 due to an impact or the like and receives a shearing force in the horizontal direction H, as shown in FIG. It is possible to absorb the vibration energy in the horizontal direction H by shear deformation in the horizontal direction H, and to quickly attenuate external forces such as vibration and impact.
- the seismic isolation device 1 having the cylindrical body 14 formed by stacking the cylindrical body 11 in a multilayered manner in the cylindrical hollow portion 11 and press-fitting it has stable strain dependence, temperature dependence, and surface pressure dependence. It has the characteristics and stable performance against repeated excitation in long-time earthquakes.
- Examples 1 to 10 At least one of the thermally conductive filler and the scale-like graphite as the graphite and the phenol resin as the thermosetting resin or the rubber powder and the crystalline polyester resin is added to the blending ratio (volume%) shown in Tables 1 and 2.
- the material of the attenuating body was gradually cooled and cooled to room temperature, and then a disk-shaped (disc-shaped) attenuating body 12 having a diameter of 50 mm and a length of 10 mm was taken out from the cylindrical hollow portion of the mold.
- the damping performance, surface pressure dependence, and yield load maintenance rate of the seismic isolation device 1 were evaluated by the following methods.
- the seismic isolation device 1 is loaded with the vertical surface pressures (vertical loads) P of 5 MPa, 10 MPa, 15 MPa, and 20 MPa shown above, respectively, and the intercept loads Qd at the respective vertical surface pressures P are obtained.
- the change in the section load Qd due to the vertical surface pressure P was calculated by a ratio (magnification) with the section load Qd having a vertical surface pressure of 5 MPa as 1.00, and the surface pressure dependency was evaluated by this ratio.
- the seismic isolation device 1 in which this ratio increases with an increase in the vertical surface pressure P generates an intercept load Qd corresponding to the vertical surface pressure P, and exhibits a seismic isolation effect corresponding to the superstructure with different loads to be supported. It will have the characteristics that can be.
- the seismic isolation device 1 including each of the cylindrical bodies 14 made of the damping body material shown in Table 1 and Table 2 has a vertical surface pressure P of The intercept load Qd increases as it rises.
- the ratio between the intercept load Q at each vertical surface pressure P and the intercept load at a vertical surface pressure of 5 MPa is 10 MPa, which is twice the vertical surface pressure P with respect to 5 MPa.
- the vertical surface pressure P is 15 MPa which is 3 times as large as 5 MPa, 1.52 to 1.92
- the vertical surface pressure P is 20 MPa which is 4 times as large as 5 MPa.
- FIG. 6 is a test of horizontal restoring force characteristics, which is a relationship between a horizontal displacement ⁇ (mm) and a horizontal load (horizontal force) Q (kN) in the seismic isolation device 1 including the cylindrical body 14 of Example 6. A result (hysteresis curve) is shown.
- the ratio between the intercept load at a vertical surface pressure of 5 MPa and the intercept load at each of the vertical surface pressures of 10 MPa, 15 MPa, and 20 MPa in a seismic isolation device having a cylindrical lead (lead plug) instead of the cylindrical body 14 is as follows:
- the vertical surface pressure is 1.02 at a pressure of 10 MPa, 1.04 at a pressure of 15 MPa, and 1.06 at a pressure of 20 MPa.
- the seismic isolation device in which such a lead plug is press-fitted is from the seismic isolation device 1 of this example. Is also inferior.
- the seismic isolation device 1 is subjected to repeated excitation of (1) horizontal deformation rate of 100%, 0.1 Hz and (2) horizontal deformation rate of 300%, 0.33 Hz to maintain the yield rate of energy absorption performance.
- the seismic isolation device of Comparative Example 1 used in the test is a seismic isolation device in which a lead plug is press-fitted into the cylindrical hollow portion 11 at the center of the laminated elastic body 8 instead of the cylindrical body 14.
- the device is a seismic isolation device that press-fits a cylindrical body obtained by compression molding an attenuating material made of thermally conductive filler, scaly graphite, vulcanized rubber powder, crystalline polyester resin and coumarone resin instead of lead plugs. It is.
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Abstract
Description
熱導電性フィラー及び黒鉛としての鱗片状黒鉛及び熱硬化性樹脂としてのフェノール樹脂又はこれらにゴム粉末及び結晶性ポリエステル樹脂のうちの少なくとも一方を表1及び表2に示す配合割合(体積%)に秤量し、これらをミキサーなどの撹拌混合器に投入し、均一に撹拌混合した混合物を120℃の温度に加熱したニーダーに投入し、加熱しながら混錬して減衰体材料を作製し、この減衰体材料を120℃の温度に加熱した金型の円柱状中空部に充填し、成型圧力60N/mm2で圧縮成形し、圧縮成形後、金型の円柱状中空部で加圧状態を保持しながら減衰体材料を徐冷し、常温まで冷却した後、金型の円柱状中空部から直径φ50mm、長さ10mmの円盤状(円板状)の減衰体12を取り出した。
免震装置1に、鉛直方向に5MPa、10MPa、15MPa及び20MPaの夫々の鉛直面圧Pを負荷した状態で水平方向Hに0.33Hzの加振周波数で加振して水平方向剪断変形(±48mm=±100%剪断歪)を生じさせた。免震装置1の下端に対するその上端の水平方向の変位(横軸δ)と免震装置1の水平方向荷重(水平力)(縦軸Q)との関係(水平復元力特性図)を示す図5において、ヒステリシス曲線(実線)で囲まれた領域の面積ΔWが大きくなるほど、振動エネルギを多く吸収できることを意味するが、ここでは、水平方向剪断変形、即ち±100%剪断歪における切片荷重(降伏荷重)Qd(ヒステリシス曲線が縦軸Qと交差する点での水平方向荷重Qd1及び│Qd2│を用いて、式:Qd=(Qd1+│Qd2│)/2で計算した値)で円柱体14の減衰性能を評価(切片荷重Qdが大きくなるほど、ヒステリシス曲線で囲まれた領域の面積が広くなり、減衰性能が優れることを示す)した。
免震装置1に、先に示した5MPa、10MPa、15MPa及び20MPaの鉛直面圧(鉛直荷重)Pを夫々負荷し、各鉛直面圧Pにおける切片荷重Qdを求め、10MPa、15MPa及び20MPaの各鉛直面圧Pによる切片荷重Qdの変化を、鉛直面圧5MPaの切片荷重Qdを1.00とした比(倍率)で算出して、この比で面圧依存性を評価した。この比が鉛直面圧Pの増加に伴って増加する免震装置1は、鉛直面圧Pに応じた切片荷重Qdを発生し、支持する荷重の異なる上部構造物に応じた免震効果を発揮できる特性を有することになる。
免震装置1に、(1)水平方向変形率100%、0.1Hz及び(2)水平方向変形率300%、0.33Hzの繰り返し加振を行い、エネルギ吸収性能の維持率を降伏荷重維持率(=Qdn/Qd1、ここで、Qd1は、一回目の加振での切片荷重Qdの値であって、Qdnは、n回目の加振での切片荷重Qdの値)として求める試験を行った。
2 弾性板
3 弾性層
4 薄肉剛性鋼板
5、6 厚肉剛性鋼板
7 剛性層
8 積層弾性体
9 被覆層
10 内周面
11 円柱状中空部
12 減衰体
14 円柱体
Claims (10)
- 剛性層及び弾性層が交互に積層されてなる積層弾性体と、少なくともこの積層弾性体の内周面で規定された少なくとも一つの柱状中空部に配された減衰体からなる柱体とを備えており、減衰体は、熱伝導性フィラーと黒鉛と熱硬化性樹脂とを含んでいる免震装置。
- 剛性層及び弾性層が交互に積層されてなる積層弾性体と、少なくともこの積層弾性体の内周面で規定された少なくとも一つの柱状中空部に配されていると共に柱状中空部の軸方向に積層された複数個の減衰体からなる柱体とを備えており、各減衰体は、熱伝導性フィラーと黒鉛と熱硬化性樹脂とを含んでいる免震装置。
- 減衰体は、熱伝導フィラー35~70体積%と、黒鉛5~50体積%と、熱硬化性樹脂10~30体積%とを含んでいる請求項1又は2に記載の免震装置。
- 熱伝導フィラーは、金属酸化物、金属窒化物、金属炭化物及び金属水酸化物の粒子のうちの一種若しくは二種以上を含んでいる請求項1から3のいずれか一項に記載の免震装置。
- 黒鉛は、人造黒鉛及び天然黒鉛のうちの少なくとも一方からなる請求項1から4のいずれか一項に記載の免震装置。
- 熱硬化性樹脂は、フェノール樹脂を含んでいる請求項1から5のいずれか一項に記載の免震装置。
- 減衰体は、ゴム粉末及び結晶性ポリエステル樹脂のうちの少なくとも一方を更に含んでいる請求項1から6のいずれか一項に記載の免震装置。
- 減衰体は、ゴム粉末40体積%以下と結晶性ポリエステル樹脂25体積%以下とのうちの少なくとも一方を含んでいる請求項7に記載の免震装置。
- ゴム粉末は、加硫ゴム粉末及びシリコーンゴム粉末のうちの少なくとも一方からなる請求項7又は8に記載の免震装置。
- 柱体は、積層弾性体と共に積層方向の荷重をも支持するようになっている請求項1から9のいずれか一項に記載の免震装置。
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EP15864148.0A EP3225876A4 (en) | 2014-11-28 | 2015-11-24 | Seismic isolation device |
CN201580064911.3A CN107002813B (zh) | 2014-11-28 | 2015-11-24 | 隔震装置 |
US15/528,715 US20170268225A1 (en) | 2014-11-28 | 2015-11-24 | Seismic isolation apparatus |
KR1020177014349A KR102399782B1 (ko) | 2014-11-28 | 2015-11-24 | 면진 장치 |
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JP2015-001197 | 2015-01-06 |
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