| 摘要 |
A support structure for isolating earthquake motions having a pressure receiving concave curved steel plate connected with the ground and a pressure applying convex curved steel plate facing with said concaved steel plate and connected with a column of a structure. The support structure has a plurarities of large balls and small balls with (less accuracy) smaller diameter than that of pressure-receiving balls between said two plates in a state that they are mounted to come in point contact in all directions. Earthquake is isolated by a simultaneous rotation of these two groups of balls in frictionless state. The lower portion of the support structure is surrounded by a hoop to suppress the foundation column not to remove from pressure receiving balls in case of jump-up phenomenon caused by directly under earthquake or float-up phenomenon caused by typhoon etc.
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