2007 年 53A 巻 p. 998-1008
To find the effect of various hook shapes of cross tie reinforcement, cyclic horizontal loading tests were performed on 4 types of column specimens. Using the curvature and strain of cross tie reinforcement, deformation of those specimens was also obtained. It was found that the difference of ductility of those specimens was as small as 3% because the difference in ultimate curvature was small.