Abstract
In an analysis of elasto-plastic behaviors of steel box column piers under seismic loading, FEM shell element model is not practical because of its high cost, and a simple 3 dimensional beam model to simulate nonlinear behavior of steel box column piers has been required. Thinking it into consideration that the relation between strength of a steel box column pier against horizontal loading and its axial dimension change dose not depend on load history, the authors developed a new method for modelling performance of a pier against horizontal loads based on its behavior under monotonic loading. In this paper, the modelling method of a steel box column pier, considering buckling and yielding, and the example of calculation are shown.
