セルフセンタリング柱脚を用いた鉄骨骨組の残留変形低減効果

概要

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This paper examines the MRF behavior with self-centering column bases for aiming to reduce the residual deformation after earthquakes. The self-centering column base has frag-shape hysteresis, and it is expected to reduce the residual deformation not only for column bases but also the entire MRF. The analysis is conducted for many earthquake records, and the results are evaluated in terms of the maximum drift and residual drift. Compared to the conventional fixed column bases or exposed column bases, the maximum drift tends to increase due to the flag-shape hysteresis, but the residual drift decreases dramatically. The results show that well considered self-centering column bases would make significant reduction of the residual drift and at the same time keep the maximum drift remain not increased.
2008-03-25