5CHOI C K, KIM E D. Multistory frames under sequential gravity loads[J]. Journal of Structural Engineering, ASCE, 1985, 111(11): 2373-2384.
6CHOI C K, CHUNG H K, LEE D G, et al. Simplified building analysis with sequential dead loads-CFM[J]. Jour- nal of Structural Engineering, ASCE, 1992, 188(4): 944-954.