Wind stability analysis for tall antenna mast in integral-lift-base construction

Nonlinear analysis of static integral stability of mast structure under wind load is done for a tall antenna mast in integral-lift-base construction.Based on the nonlinear equilibrium equations,the software ANSYS has been used to analyze the structure.First of all to find up-bound of numerical solution about mast buckling load by an eigenvalue method,and then to take the solution as a given load for analysis of nonlinear buckling.When arriving to the load in loading step by step,a critical coefficient of nonlinear buckling,that is to say the safety factor for the integral-lift-base construction,is found.Meanwhile,the post-buckling behavior is known.