ABSTRACT
Nonlinearity due to the beam-column connection deformation, the member material yielding and the second-order effects of geometric changes are major factors controlling the dynamic response of three dimensional steel frames under seismic loads. The advanced analysis method using stability functions and refined plastic-hinge approach is proposed by Kim et al. (2001). The nonlinear analysis for the space steel frames with semi-rigid connections is developed by Kim & Choi (2001). This solution method incorporates geometric and material nonlinearities and the nonlinearity caused by the presence of flexible joints under static loads. Second-order inelastic analysis for space steel frames with rigid connections are developed by Chiorean & Barsan (2005) and Kim et al. (2006).
