ABSTRACT
Large-span structures are shown by a variety of shapes and grid patterns nowadays, especially with irregular surfaces. Furthermore, single-layered space frames have become more and more popular. In this study, we propose a new scheme of nonlinear analysis for checking instability of Incheon International Airport Terminal-2, which was opened in January 2018 for the Olympic Winter Games in PyeongChang, South Korea. Designed by a single layered irregular space frame, the terminal poses difficulties for nonlinear geometrical analysis due to limitation of the personal computer’s ability by the number of rigid joints in the roof. Therefore, we attempt an easier approach where analytic range is chosen by only a centre part of the roof instead of the whole structure, and the cut boundaries are substituted with elastic springs. The scheme shows some merits for saving memory and calculation time.
