Abstract
In seismic design of railway structures, it is verified whether plastic deformation capacity, what is called, ductility of structural members may exceed seismic response. Authors have already proposed a method to quantitatively evaluate ductility correspondent to damage levels for concrete-filled tubular steel column members. On the other hand, seismic response should be evaluated through dynamic analysis with computers. In those cases, the reliability of calculated response depends strongly upon hysteresis model of structural members, so that the study on hysteresis model is one of important research issues. In this paper, based on the results of alternate loading tests, which have been performed by authors, a hysteresis model of concrete-filled tubular steel column members was proposed and the validity of a hysteresis model was verified through the pseudo-dynamic tests.
