Semi-analytical free vibration analysis of the space mega frame structure of the super high-rise buildings

Abstract：In the paper, super high_rise building space_mega_frame structures are simplified equivalently and continuously to a three_dimensional model, which is a combination of stiffened_thin_wall tubes. And free vibration analysis of a super high_rise building space_mega_frame structure was made by using semi_analytical method based on the three dimensional model. The effectiveness and rationality of the method were verified through a numerical example.

Keyword：super highrise building structure; space mega frame; stiffened thinwalled tube; semianalytical method; ordinary differential equation solver;