Base Isolation Structure
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United States of America Patent
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Issued Date -
Feb 7, 2008
app pub date -
May 13, 2005
filing date -
May 17, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A base isolation structure capable of securing stable operation since there is no such a possibility that micro-vibration usually produced does not exceed a requested allowable vibration value by developing base isolating effects in earthquake to prevent heavy damages from occurring and effectively isolating a structure in which vibration-sensitive equipments are disposed such as a semiconductor manufacturing plant from earthquake. A base isolation device (4) by a rigid sliding bearing having such a rigidity in the vertical and horizontal directions that micro vibration transmitted to the structure (1) can be reduced to a value smaller than the allowable vibration value determined according to the degree of the reluctance of the equipments is disposed between the structure (1) in which the micro vibration-sensitive equipments are disposed and the foundation (3) of the structure.
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