CREEP-BUCKLING ANALYSIS OF RECTANGULAR-SECTION COLUMNS

摘要

A previous analysis of the creep behavior of a slightly curved pin-ended H-section column under constant load is extended to the slightly curved solid rectangular-section column. The analysis leads to a dif-ferential equation for the plastic strains at the midheight cross section. The form of the equation indicates the significant parameters which may be useful in plotting test data on the creep life of columns. These are a lifetime parameter t'cr, an initial-straightness param¬eter S or S', A numerical method of solving, the differential equation, suitable for use with a high-speed digital computer, is described, and typical computed results are given. The existence of a finite lifetime, although not evident from the differential equation, is argued intuitively and confirmed by the numerical computations.