Abstract
In order to clarify the dynamic inelastic behavior of the steel pier, it is pointed out that the geometrical nonlinearity should be taken into account in the analysis. On the other hand, the effect of shear stress on the yielding of the steel material is generally ignored in the analysis. In this paper, the dynamic inelastic behavior of the steel pier is examined by employing the rigid-body-spring model analysis, where the geometrical nonlinearlity and the effect of the shear stress on the yielding of the steel material are incorporated, and these effects on the dynamic inelastic behavior of the steel pier is investigated quantitatively. Moreover, the effect of the initial crookedness on the dynamic inelastic behavior of the steel pier is investigated.