View article

This paper will focus on aspects of the advanced analysis and underlying behavior of composite structures with concrete-filled steel tube (CFT) columns. Through a detailed examination of the results of a suite of full-scale slender CFT beam-column tests, insight into the cyclic behavior of such members is gained, specifically pertaining to local buckling of the steel tube and the plastic hinge length. Modeling techniques, which capture these behaviors, are introduced and incorporated into a general purpose distributed plasticity fiber based beam element formulation. The model is found to be capable of capturing the observed behavior and producing accurate results.