The author has proposed the formulas for estimating the flexural ductility of R/C square columns and rectangular columns. However, the flexural ductility of R/C square columns related to the configuration of reinforcements is not verified by comparative tests. In this study, tests of R/C square columns related to the configuration of reinforcements using 685N/mm2 and 785N/mm2 class transverse reinforcement have been conducted under high compressive axial force. Based on these test results, the accuracy of estimated flexural ductility of R/C square columns is clarified.
