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Exact buckling load of a restrained RC column
Krauberger, Nana,Saje, Miran,Planinc, Igor,Bratina, Sebastjan Techno-Press 2007 Structural Engineering and Mechanics, An Int'l Jou Vol.27 No.3
Theoretical foundation for the buckling load determination in reinforced concrete columns is described and analytical solutions for buckling loads of the Euler-type straight reinforced concrete columns given. The buckling analysis of the limited set of restrained reinforced concrete columns is also included, and some conclusions regarding effects of material non-linearity and restrain stiffnesses on the buckling loads and the buckling lengths are presented. It is shown that the material non-linearity has a substantial effect on the buckling load of the restrained reinforced concrete columns. By contrast, the steel/concrete area ratio and the layout of reinforcing bars are less important. The influence on the effective buckling length is small.