The purpose of this paper is to present a physical consideration on the influence of the damping correction factor on the ripple shape of the velocity response spectrum. The results of the study showed that when the ripple shape is convex upwards, the damping correction factor tends to be smaller. This indicates that ripple shape of the velocity response spectrum is caused by the input energy of the earthquake motion at the resonance. It was also revealed that earthquake motion such as inland crustal types with a small number of repetitions results in a smaller ripple shape of the velocity response spectrum, resulting in a smaller damping effect.
ITO et al. (Thu,) studied this question.