1. Base Isolation Technology November, 2000 ・ Principle of Base Isolation System ・ Example of Base-isolation Building ・ Analytical Model of Base-isolation Building ・ Input Earthquake Waves ・ Results of Earthquake Response Analyses 1
2. Principle of Base Isolation System To TOP Base Isolation System is like a Suspension System of Motorcar Soft spring + Oil Damper Damper Laminated rubber bearing 2
3. Base Isolation System To Back Laminated rubber bearing Soft in Horizontal direction Hard in Vertical direction Rubber Sheet Steel Plate 3
4. Base Isolation System To Back Laminated rubber bearing Rubber block Rubber block Laminated rubber bearing 1. Vertical direction 2. Horizontal direction Principle of Laminated rubber bearing Rubber block 4
5. Base Isolation System Damper To TOP Steel damper Lead damper Oil damper Friction damper with Coned disc springs 5
6. Example of Base-isolation Building Base Isolated Research Building Base Isolation Device Location : Tokyo Architect : Obayashi Corporation Structure : RC ; B1,5F Total floor area : 1,624 m 2 Date of completion : August 1986 6
7. Example of Base-isolation Building Base Isolated Research Building (Elevation) Base Isolation Device (Floor Plan) 7 Rubber Bearing Steel Damper
8. Base Isolation Building Principle Seismic Acceleration Response Spectrum 8 Comparison of Seismic Response Amplification factor of acceleration Period(sec.) Conventional Building Base Isolation Building Story Displacement Acceleration Story Displacement Acceleration El Centro 1940NS 25Kine Input Base Isolation System
17. Effects of Base Isolation System 17 Building with Seismic Isolation Conventional Building ・ Improvement for Safety of Building ・ Keep for Function of Building ・ Preservation for Property
18. 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 18