Method and apparatus for evaluating soundness of block-like structures
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United States of America Patent
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Nov 26, 1996
Grant Date -
N/A
app pub date -
Apr 18, 1995
filing date -
Jun 17, 1994
priority date (Note) -
Expired
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Abstract
The soundness of a block-shaped structure is evaluated by disposing one set of at least two three-way sensors on a structure, measuring microtremors, determining the contribution factor of rocking vibration, which occupies part of overall vibration, based upon the results of microtremor measurement, and determining extent of rocking vibration at an arbitrary position of the block-shaped structure based upon the contribution factor. Rocking vibration becomes more prevalent as the state of support afforded by the block-shaped structure becomes more unstable. Accordingly, if rocking vibration becomes dominant and exceeds unity, this fact can be used to evaluate the soundness of the block-shaped structure to collapse.
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