Abstract
The experimental study, on the rectangular steel section subjected to alternative bending moment under constant axial tension, are carried out for the purpose of supported the theory, that previously presented (part 1. 2). The results of experiment are following 1) Assumptions on the theory are adequate untill strain become to the strain hardening region. 2) The theortical shake-down load are atested experimentaly, and when bending moment over that shake-down load, the strain are increasing by alternative moment, and incremental strain are coincide with theortical value.
