Column Ⅱ

[2034] Evaluation on The Longitudianl Bar Pull-out Effect of a RC Column Based on E-Defense Excitation

Heng GAO¹, Kenji KOSA², Tatsuo SASAKI³, Zhongqi SHI⁴ (1.九州工業大学工学府大学院 2.九州工業大学工学部 3.大日本コンサルタント技術統括部 4.九州工業大学大学院)

Keywords:E-Defense excitation, pulling out, strain distribution, multi-layer, bar-to-bar reduction

Displacement of RC column, which is not only caused by flexure but also rotation induced by longitudinal bar pulling out from inside footing. To evaluate the effect of pulling out of the longitudinal bar (pullout) in the column top displacement, experimental data of a full-scale RC column (C1-1) by shake table test is summarized. Pullout at base contributes about 33.6% to the column top displacement. Analysis was conducted to explain the mechanism of pullout. The experimental and analytical results showed that multi-layer induced reduction influence from bar-to-bar contributes to pullout.