Base Isolation Technology

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Base Isolation Technology
Principle of Base Isolation System Example of
Base-isolation Building Analytical Model of
Base-isolation Building Input Earthquake
Waves Results of Earthquake Response Analyses
November, 2000
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Principle of Base Isolation System
Base Isolation System is like a Suspension
System of Motorcar
Soft spring Oil Damper
Laminated rubber bearing
Damper
To TOP
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Base Isolation System
Laminated rubber bearing


Soft in Horizontal direction Hard in Vertical
direction


Rubber Sheet
Steel Plate
To Back
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Base Isolation System
1. Vertical direction

Rubber block
Laminated rubber bearing
2. Horizontal direction

Rubber block
Rubber block
Laminated rubber bearing


Principle of Laminated rubber bearing
To Back
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Base Isolation System Damper
Oil damper
Steel damper
Friction damper with Coned disc springs
Lead damper
To TOP
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Example of Base-isolation Building
Location Tokyo Architect Obayashi
Corporation Structure RC B1,5F Total floor
area 1,624 m2 Date of completion August 1986
Base Isolated Research Building
Base Isolation Device
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Example of Base-isolation Building
Steel Damper
Rubber Bearing
Base Isolated Research Building
(Elevation)
Base Isolation Device (Floor Plan)
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Base Isolation Building
Base Isolation System
Principle
Acceleration
Acceleration
Story Displacement
Story Displacement
Conventional Building
Amplification factor of acceleration
Base Isolation Building
El Centro 1940NS 25Kine Input
Period(sec.)
Seismic Acceleration Response Spectrum
Comparison of Seismic Response
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Analytical Model of Base-isolation Building
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Analytical Model of Base-isolation Building
Hysteresis Characteristics
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Input Earthquake Waves
KOBENS (818gal)
DZCEW (369gal)
YPTNS (321gal)
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Effectiveness of Base Isolation System
DZCEW369gal
YPTNS321gal
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Results of Earthquake Response Analyses
Response Acceleration
Story Displacement
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Results of Earthquake Response Analyses
KOBENS (818gal)
DZCEW (369gal)
YPTNS (321gal)
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Results of Earthquake Response Analyses
Hysteresis Characteristics
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Results of Earthquake Response Analyses
Hysteresis Characteristics
DZCEW
YPTNS
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Effects of Base Isolation System
Improvement for Safety of Building Keep for
Function of Building Preservation for Property

Conventional Building
Building with Seismic Isolation
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Application of Base-isolated Structure
1) Government and Municipal Office, Fire
Station, Police Station,
Broadcasting Station 2) Hospital, Social welfare
facilities 3) Laboratory 4) Computer Center 5)
Museum, Gallery, Library 6) Apartment House 7)
Cultural Asset, Historic Structure
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