残留変形低減をめざしたセルフセンタリング柱脚の開発と載荷実験

概要

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Residual lateral drift of buildings after large earthquakes can be a critical issue for continuous use of the buildings. This study focuses on a self-centering system applied to column bases for the reduction of residual drifts. The proposed system is pressed down on the grade beam by a pair of PC bars and reinforced by a pair of dampers. The partial frame, which comprises of a column and a grade beam, is tested. The test results show that the self-centering system equipped with PC bars has a good self-centering capability, and the dampers can supply larger stiffness, strength and energy dissipation. Their characteristics can be assessed reasonably by simple equations. When the specimens suffer large deformations, their residual deformations increase particularly for large dampers. The residual deformations, however, are completely removed once the yielded dampers are removed.
2007-02-28