| 摘要 |
The present invention relates to a technique wherein a complex structure is adopted as a joint structure between each head of plural piles (1) and a bottom of a footing (2), and the complex structure may be selected among either a complex of a roller bearing structure (Y) interposing a sliding member (12) and a pin bearing structure (X) interposing a sliding member (32), another complex of a rigid joint structure (Z) and the roller bearing structure (Y), or still another complex of the rigid joint structure (Z) and a pin bearing structure (X). This can restrain the rotation of an upper structure (A), reduce stress concentration applied to a joint portion and occurrence of a bending moment on the pile (1) in applying a great external force such as an earthquake thereto, prevent damages or destroys of the joint portion and the pile, and also enhance excellent positional restoration performance for restoring the upper structure (A) to an initial position thereof, after the earthquake happens.
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