CREEP EFFECT ANALYSIS OF GEOMETRIC NONLINEAR STRUCTURES

The creep analysis of geometric nonlinear structures is studied.Based on the theory of large deformation,the nonlinear geometric equation of three dimensional beam elements is deduced.Then,the computational principle and corresponding formulation of the creep analysis of geometric nonlinear structures are presented.Considering the effect of the internal force redistribution of structures caused by creep deformation,the incremental step-by-step procedure for analyzing the creep effect of geometric nonlinear structures at construction stages is achieved.In the end,the validity of the program is verified by test results.