| 要旨 |
Five steel tube-encased concrete (SC) columns confined by circular thin steel tube were fabricated and tested under cyclical reversed horizontal load to investigate the structural performance of them with axial load ratio and infilling of concrete into the encased steel tube as primary experimental variables. Test results indicated that confinement by circular thin steel tube could ensure sufficient deformability up to the drift angle of about 0.04 rad, while infilling of concrete into the encased steel tube showed little influence on the structural performance. In addition, numerical analysis was conducted and the calculated results predicted the experimental ones very well in aspects of ultimate flexural strength of SC column section and horizontal force versus drift angle relation. |