抄録
This research was performed to study the inelastic torsional behavior of steel members, eighteen specimens of which the cross-sections are the rolled H shape and the square hollow shape were tested with the experimental parameter of the slenderness ratio, the width-to-thickness ratio and the residual stress. For the rolled H-section steel member with the elastic end warping restraints, the analytical method based on the generalized hinge method was presented. The results obtained througth the experiments and the analyses may be summarized as follows For the H-section steel members, (1) The initial torsional stiffness depends on the end conditions. (2) As the slenderness ratio increases, the ductility factor decreases. (3) The inelastic torsional behavior can be conservatively estimated based on the generalized hinge method. For the square hollow section steel members, (4) The initial torsional stiffness is agreed with the analytical value. (5) The yield torque and the maximum torque are affected by the cold forming. (5) As the width-to-thickness increases, the ductility factor decreases. (7) The yielding behavior of section is affected by the residual stress due to cold forming.
