EP0341058A1 - Appui résistant aux secousses - Google Patents

Appui résistant aux secousses Download PDF

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Publication number
EP0341058A1
EP0341058A1 EP89304491A EP89304491A EP0341058A1 EP 0341058 A1 EP0341058 A1 EP 0341058A1 EP 89304491 A EP89304491 A EP 89304491A EP 89304491 A EP89304491 A EP 89304491A EP 0341058 A1 EP0341058 A1 EP 0341058A1
Authority
EP
European Patent Office
Prior art keywords
bearing
shakeproof
high damping
elastomer
damping elastomer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89304491A
Other languages
German (de)
English (en)
Other versions
EP0341058B1 (fr
Inventor
Teruo Sasaki
Kazuhiro Fujisawa
Yoshiaki Miyamoto
Mitsuo Miyazaki
Fumiaki Arima
Yuji Mitsusaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CESSIONE;SUMITOMO GOMU KOGYO KABUSHIKI KAISHA
Original Assignee
Sumitomo Rubber Industries Ltd
Sumitomo Construction Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Rubber Industries Ltd, Sumitomo Construction Co Ltd filed Critical Sumitomo Rubber Industries Ltd
Publication of EP0341058A1 publication Critical patent/EP0341058A1/fr
Application granted granted Critical
Publication of EP0341058B1 publication Critical patent/EP0341058B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/34—Foundations for sinking or earthquake territories
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
    • E04H9/022—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising laminated structures of alternating elastomeric and rigid layers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground

Definitions

  • the present invention relates to a shakeproof bearing using a high damping elastomer made of butyl rubber, NBR or the like as an energy absorber (hereinafter called a damper).
  • the following structure has been hitherto known as a shakeproof bearing for protecting a superstructure such as a building from destructive force of earthquake by slidably supporting this superstructure on a substruc­ture such as its foundation in the horizontal direction, and reducing the input acceleration of the earthquake.
  • FIG. 9 What is shown in FIG. 9 is a shakeproof bearing alternately laminating a hard plate 1 such as steel plate, and a rubber-like elastic plate 2 small in compression set.
  • This shakeproof bearing 3 has an extremely large ratio of the modulus of elasticity in the vertical direc­tion to the modulus of elasticity in the horizontal direc­tion, and it can support the building slidably in the horizontal direction while keeping stable in the perpendicular direction.
  • the natural oscilla­tion period of the building is made longer than the period of the maximum amplitude component of the earthquake, so that the acceleration response of the building when struck by an earthquake can be reduced.
  • This shakeproof bearing itself has hardly any capacity for absorbing vibration energy during aseismic action, it is necessary to be furnished with a damper for absorbing energy.
  • FIG. 10 shows a shakeproof bearing having a lead plug 4 placed in the middle of the shakeproof bearing 3 shown in FIG. 9 as a damper to absorb energy (Japanese Patent Publication 61-17984).
  • FIG. 11 What is shown in FIG. 11 is a shakeproof bearing intended to eliminate the defects of the lead plug 4 by using a high damping elastomer 5 possessing an action for absorbing vibration energy for the rubber-like elastic plates in the shakeproof bearing 3 explained in FIG. 9 (Japanese Laid-Open Patent 62-83139).
  • the shakeproof bearing 8 shown in FIG. 12 is designed so that the high damping elastomer may not directly support the large vertical load of the super­structure.
  • a penetration hole is opened in the vertical direction in the middle of the shakeproof bearing 3 in FIG. 9, and a high damping elas­tomer 7 is inserted in this penetration hole so as to absorb the vibration energy (Japanese Laid-Open Utility Model 61-39705).
  • the shakeproof bearing 8 shown in FIG. 12 ap­pears to support the vertical load only by the laminated portion of hard plate 1 such as steel plate and rubber-­like elastic plate 2.
  • the high damping elastomer 7 also supports the vertical load substantially. This is explained below. When loaded in the vertical direction, the rubber-like elastic plate 2 is compressed, and, same as a strain occurs, the internal high damping elastomer 7 is compressed and bulges out in the horizontal direction. Its circumference is confined by the hard plate 1 and rubber-like elastic plate 2.
  • the high damping elastomer 7 same as the rubber-like elastic plate 2, supports the vertical load, Therefore, when an elastomer having a large creep amount is used inside, the creep strain of the entire bearing increases.
  • the high damping elastomer generates, by nature, a large creep strain. Accordingly, although the creep amount of the shakeproof bearing 8 shown in FIG. 12 is small as compared with that of the shakeproof bearing 6 shown in FIG. 11, it is larger as compared with that of the shakeproof bearing 3 made of an elastomer small in damping as shown in FIG. 9. Hence, the durability was impaired by the internal strain due to creep.
  • this invention presents a shakeproof bearing characterized by disposing a high damping elastomer on the circumference of a bearing body formed by alternately laminating a hard plate possess­ing stiffness and a rubber-like elastic plate small in compression set.
  • This high damping elastomer may be also presented as a laminate formed by alternately laminating and adhering a hard plate possessing stiffness and a plate-shaped high damping elastomer.
  • the high damping elastomer in the shakeproof bearing of the invention is disposed on the outer circum­ference of the bearing body subjected to vertical load, and is free to bulge out to the deformation stress due to external force when struck by an earthquake. Accord­ingly, it is free from vertical load, and creep is not generated, and hence the life is long.
  • the damping constant can be increased.
  • FIG. 1 A basic structure of the shakeproof bearing 10 of the invention is shown in FIG. 1.
  • This shakeproof bearing 10 is composed by forming a columnar bearing body 13 by alternately laminating a rubber-like elastic plate 11 small in compressing set such as natural rubber, and a hard plate 12 such as steel plate, with its circumfer­ence surrounded by a high damping elastomer 14. Between this high damping elastomer 14 and the bearing body 13, although it is not necessary to provide a gap, it is better not to adhere with each other. If the damping capacity of the rubber-like elastic plate 11 small in compression set is high or low, it may be adjusted by varying the quantity or performance of the externally mounted high damping elastomer 14.
  • the rubber-like elastic body 11 small in compressing set such as natural rubber, it means an elastomer of which compression set is 25% or less.
  • the high damping elastomer 14 refers to a material of which tan ⁇ is 0.15 to 1.5 at the time of 25°C, 0.5 Hz, ⁇ 50% shearing strain, and absolute value of complex modulus
  • is the absolute value of the complex modulus G*, that is,
  • this high damping elastomer may include butyl rubber, NBR poly­norbornene etc.
  • elastomer mixtures high in damping obtained by adding reinforcing agent, filler, resins, softening agents or the like to NR, SBR, BR, polynorbornene, silicone rubber, fluororubber, chlorobutyl rubber, chloro­prene rubber, urethane elastomer, or their blends.
  • FIG. 1 A practical example of fabrication of the basic structure in FIG. 1 is explained below while referring to FIG. 2.
  • a columnar bearing body 13 is formed by using 39 pieces of natural rubber measuring 600 mm in diameter R and 4 mm in thickness as rubber-like elastic plate 11, and 38 steel plates of 2 mm in thickness as the hard plate 12 sand­wiched by natural rubber.
  • the high damping elastomer 14 disposed concentrically around this bearing body 13 is cylindrical, measure 620 mm in inside diameter,and 880 mm in outside diameter.
  • the high damping elastomer 14 is made of polynorbonen of which tan ⁇ is 0.53 at the time of 25°C, 0.5 Hz, ⁇ 50% shearing strain, and absolute value of complex modulus
  • Flanges 15 of high strength are affixed to the upper and lower surfaces of the bearing body 13 and high damping elastomer 14. In this particular example, the adjoining elastic plate 11 and steel plate 12 are bonded together, although they need not be done so necessarily
  • the damping constant h is a value for expressing the vibration damping performance such as vibration, and it is expressed in the formula h + 1 2 ⁇ ⁇ ⁇ W W , where ⁇ W is the energy consum ed in every period of vibration, and W is the input elastic energy.
  • the high damping elastomer 14 of this invention may not be necessarily a single piece as shown in FIG. 1 and FIG. 2. It is enough as far as the high damping elastomer 14 is disposed around the bearing body 13 in a state capable of deforming in the horizontal direction due to vibration during aseismic action. For example, when this high damping elastomer is made of a laminate, the damping constant may be much increased. Its practical example of fabrication is explained by referring to FIG. 4.
  • the portion of the high damping elastomer 14 of the shake­proof bearing 10a shown in FIG. 2 is laminated, while the other portions are same as the shakeproof bearing 10a shown in FIG. 2 in materials, dimensions, and shapes.
  • the laminate 14a of this high damping elastomer is com­posed of 20 high damping elastomer plates 17 of 7.8 mm in thickness, being laminated with 4 mm thick steel plates 18 alternately as hard plates.
  • the overall dimensions of the laminate 14a are same as those of the high damping elastomer 14 shown in FIG. 2, that is, cylindrical measur­ing 620 mm in inside diameter and 880 mm in outside diam­eter.
  • the material of the high damping elastomer plates 17 is also same as the high damping elastomer 14 shown in FIG. 2, that is, polynorbornene having tan ⁇ of 0.53 at the time of 25°C, 0.5 Hz, ⁇ 50% shearing stress, and abso­lute value of complex modulus of 7 kgf/cm2 at this time.
  • the hard plates 18, steel plates or the like may be used, but in order to enhance the fireproof performance, it is preferable to use nonflammable or flame-retardant materials low in thermal conductivity.
  • At least one cut 20 may be provided in the high damping elastomer 14 or its laminate 14a.
  • a fireproof perform­ance that is, the function of protecting the bearing body supporting the weight of the building at the time of outbreak of a fire from the fire.
  • a fireproof perform­ance that is, the function of protecting the bearing body supporting the weight of the building at the time of outbreak of a fire from the fire.
  • the high damping elastomer since the high damping elastomer will not be broken if shaken heavily by an earthquake, it can fight fire after onset of an earthquake. Besides, by replacing the high damping elastomer after the fire, it is possible to re-use without giving any damage to the bearing itself.
  • the thickenss of the high damping elastomer to be installed should be 40 mm or more, or preferably 60 mm or more.
  • the thickness is 130 mm, and in actual fabrication the thick­ness of high damping elastomer is usually considerably larger than the specified values of 40 to 60 mm, and therefore the shakeproof bearing of this invention has a sufficient fireproof performance without giving any special consideration.
  • a flame-retardant elastomer such as silicone rubber, fluororubber and chlorobutyl may be used as the high damping elastomer, or the high damping elastomer may be blended with flame retardants or addition type such as antimony oxide, organic ester phosphate, chlori­nated paraffin and inorganic salt, or flame retardant of reaction type such as tetra-bromo-bis-phenol A.
  • the bearing simultaneously possess­ing fashionableness may be also realized.
  • the bearing body and damper can be assembled in a single structure, and a shakeproof bearing having a larger damping capacity can be realized at a similar creep level as the conven­tional laminate rubber bearing made of natural rubber.
  • the high damping elastomer disposed around the bearing body as a damper exhibits the fireproof function at the same time, and the shakeproof bearing of this invention is also enhanced in the reliability in this aspect.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Environmental & Geological Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Vibration Prevention Devices (AREA)
  • Springs (AREA)
EP89304491A 1988-05-06 1989-05-04 Appui résistant aux secousses Expired - Lifetime EP0341058B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP11072088 1988-05-06
JP110720/88 1988-05-06
JP1101183A JP2536924B2 (ja) 1988-05-06 1989-04-19 免震支承
JP101183/89 1989-04-19

Publications (2)

Publication Number Publication Date
EP0341058A1 true EP0341058A1 (fr) 1989-11-08
EP0341058B1 EP0341058B1 (fr) 1992-09-23

Family

ID=26442099

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89304491A Expired - Lifetime EP0341058B1 (fr) 1988-05-06 1989-05-04 Appui résistant aux secousses

Country Status (4)

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EP (1) EP0341058B1 (fr)
JP (1) JP2536924B2 (fr)
KR (1) KR0169706B1 (fr)
DE (1) DE68902949T2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4425310A1 (de) * 1994-07-18 1996-02-22 Spannverbund Ges Fuer Verbundt Schwingungsarmer Verbundträger
CN103603378A (zh) * 2013-11-25 2014-02-26 辽宁工业大学 八圆柱嵌套筒状万向阻尼器
US20170159287A1 (en) * 2015-12-07 2017-06-08 Chong-Shien Tsai Friction-damping energy absorber

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6221847B1 (en) 1996-09-13 2001-04-24 Clemson University Composition and method for treating bacterial infection
ATE281150T1 (de) * 1996-09-13 2004-11-15 Univ Clemson Mittel zur akne behandlung
KR20010085005A (ko) * 2001-07-12 2001-09-07 이 상 준 면진장치에 공명현상을 방지하기 위하여 사용되는수직하중지지부틸고무
KR100465646B1 (ko) * 2001-12-26 2005-01-13 (주)티이솔루션 탄소성 제진장치
JP2011089328A (ja) * 2009-10-23 2011-05-06 Shimizu Corp 免震装置およびそれに用いる減衰機構ならびに免震装置の組立方法
KR101683134B1 (ko) 2010-04-15 2016-12-06 엘에스전선 주식회사 풍력타워용 면진장치
DE102014004059A1 (de) 2014-03-21 2015-09-24 Andreas D.J. Iske Schwingungsisolator
JP7390234B2 (ja) * 2020-03-30 2023-12-01 株式会社ブリヂストン 免震装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2442941A2 (fr) * 1978-12-01 1980-06-27 Freyssinet Int Stup Dispositif d'appui a fort amortissement interne
FR2594193A1 (fr) * 1986-02-07 1987-08-14 Bridgestone Corp Support antisismique et ensemble de supports antisismiques

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2623585B2 (ja) * 1987-07-27 1997-06-25 株式会社ブリヂストン 免震構造体

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2442941A2 (fr) * 1978-12-01 1980-06-27 Freyssinet Int Stup Dispositif d'appui a fort amortissement interne
FR2594193A1 (fr) * 1986-02-07 1987-08-14 Bridgestone Corp Support antisismique et ensemble de supports antisismiques

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4425310A1 (de) * 1994-07-18 1996-02-22 Spannverbund Ges Fuer Verbundt Schwingungsarmer Verbundträger
CN103603378A (zh) * 2013-11-25 2014-02-26 辽宁工业大学 八圆柱嵌套筒状万向阻尼器
CN103603378B (zh) * 2013-11-25 2015-05-27 辽宁工业大学 八圆柱嵌套筒状万向阻尼器
US20170159287A1 (en) * 2015-12-07 2017-06-08 Chong-Shien Tsai Friction-damping energy absorber
US9945116B2 (en) * 2015-12-07 2018-04-17 Chong-Shien Tsai Friction-damping energy absorber

Also Published As

Publication number Publication date
KR0169706B1 (ko) 1999-02-18
DE68902949D1 (de) 1992-10-29
KR900018482A (ko) 1990-12-21
JPH0249834A (ja) 1990-02-20
EP0341058B1 (fr) 1992-09-23
JP2536924B2 (ja) 1996-09-25
DE68902949T2 (de) 1993-01-07

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